1056404581771 has 96 divisors (see below), whose sum is σ = 1430865838080. Its totient is φ = 769744684800.

The previous prime is 1056404581753. The next prime is 1056404581787. The reversal of 1056404581771 is 1771854046501.

It is not a de Polignac number, because 1056404581771 - 2²⁷ = 1056270364043 is a prime.

It is a super-2 number, since 2×1056404581771² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (1056404581571) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 128967286 + ... + 128975476.

It is an arithmetic number, because the mean of its divisors is an integer number (14904852480).

Almost surely, 2^{1056404581771} is an apocalyptic number.

1056404581771 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1056404581771 is a deficient number, since it is larger than the sum of its proper divisors (374461256309).

1056404581771 is a wasteful number, since it uses less digits than its factorization.

1056404581771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8505 (or 8498 counting only the distinct ones).

The product of its (nonzero) digits is 940800, while the sum is 49.

The spelling of 1056404581771 in words is "one trillion, fifty-six billion, four hundred four million, five hundred eighty-one thousand, seven hundred seventy-one".