1957191145 has 16 divisors (see below), whose sum is σ = 2890621440. Its totient is φ = 1238837184.

The previous prime is 1957191143. The next prime is 1957191199. The reversal of 1957191145 is 5411917591.

It is not a de Polignac number, because 1957191145 - 2¹ = 1957191143 is a prime.

It is a super-2 number, since 2×1957191145² = 7661194356132822050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1957191143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2150305 + ... + 2151214.

It is an arithmetic number, because the mean of its divisors is an integer number (180663840).

Almost surely, 2^1957191145 is an apocalyptic number.

It is an amenable number.

1957191145 is a deficient number, since it is larger than the sum of its proper divisors (933430295).

1957191145 is a wasteful number, since it uses less digits than its factorization.

1957191145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4301544.

The product of its digits is 56700, while the sum is 43.

The square root of 1957191145 is about 44240.1530851782. The cubic root of 1957191145 is about 1250.8668429943.

The spelling of 1957191145 in words is "one billion, nine hundred fifty-seven million, one hundred ninety-one thousand, one hundred forty-five".