257155670347654 has 32 divisors (see below), whose sum is σ = 437377880782080. Its totient is φ = 112412474129952.

The previous prime is 257155670347637. The next prime is 257155670347663. The reversal of 257155670347654 is 456743076551752.

It is a happy number.

It is a super-2 number, since 2×257155670347654² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 257155670347654.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62976624 + ... + 66935539.

It is an arithmetic number, because the mean of its divisors is an integer number (13668058774440).

Almost surely, 2^{257155670347654} is an apocalyptic number.

257155670347654 is a deficient number, since it is larger than the sum of its proper divisors (180222210434426).

257155670347654 is a wasteful number, since it uses less digits than its factorization.

257155670347654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129916204.

The product of its (nonzero) digits is 740880000, while the sum is 67.

The spelling of 257155670347654 in words is "two hundred fifty-seven trillion, one hundred fifty-five billion, six hundred seventy million, three hundred forty-seven thousand, six hundred fifty-four".