1957656745 has 32 divisors (see below), whose sum is σ = 2661102720. Its totient is φ = 1369482240.

The previous prime is 1957656739. The next prime is 1957656749. The reversal of 1957656745 is 5476567591.

It is not a de Polignac number, because 1957656745 - 2¹¹ = 1957654697 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is not an unprimeable number, because it can be changed into a prime (1957656749) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 449217 + ... + 453553.

It is an arithmetic number, because the mean of its divisors is an integer number (83159460).

Almost surely, 2^1957656745 is an apocalyptic number.

It is an amenable number.

1957656745 is a deficient number, since it is larger than the sum of its proper divisors (703445975).

1957656745 is a wasteful number, since it uses less digits than its factorization.

1957656745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4665.

The product of its digits is 7938000, while the sum is 55.

The square root of 1957656745 is about 44245.4149601967. The cubic root of 1957656745 is about 1250.9660255101.

The spelling of 1957656745 in words is "one billion, nine hundred fifty-seven million, six hundred fifty-six thousand, seven hundred forty-five".