61172783895 has 24 divisors (see below), whose sum is σ = 103298981616. Its totient is φ = 30908351232.

The previous prime is 61172783887. The next prime is 61172783951. The reversal of 61172783895 is 59838727116.

It is a happy number.

It is not a de Polignac number, because 61172783895 - 2³ = 61172783887 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5643042 + ... + 5653871.

It is an arithmetic number, because the mean of its divisors is an integer number (4304124234).

Almost surely, 2^61172783895 is an apocalyptic number.

61172783895 is a deficient number, since it is larger than the sum of its proper divisors (42126197721).

61172783895 is a wasteful number, since it uses less digits than its factorization.

61172783895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11296959 (or 11296940 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 57.

The spelling of 61172783895 in words is "sixty-one billion, one hundred seventy-two million, seven hundred eighty-three thousand, eight hundred ninety-five".