40157605645757 has 4 divisors (see below), whose sum is σ = 40157754521820. Its totient is φ = 40157456769696.

The previous prime is 40157605645579. The next prime is 40157605645789. The reversal of 40157605645757 is 75754650675104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21502687135801 + 18654918509956 = 4637099^2 + 4319134^2 .

It is a cyclic number.

It is not a de Polignac number, because 40157605645757 - 2¹⁶ = 40157605580221 is a prime.

It is a super-2 number, since 2×40157605645757² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40157605645757.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40157605645357) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74032688 + ... + 74573145.

It is an arithmetic number, because the mean of its divisors is an integer number (10039438630455).

Almost surely, 2^{40157605645757} is an apocalyptic number.

It is an amenable number.

40157605645757 is a deficient number, since it is larger than the sum of its proper divisors (148876063).

40157605645757 is a wasteful number, since it uses less digits than its factorization.

40157605645757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148876062.

The product of its (nonzero) digits is 123480000, while the sum is 62.

The spelling of 40157605645757 in words is "forty trillion, one hundred fifty-seven billion, six hundred five million, six hundred forty-five thousand, seven hundred fifty-seven".