257113870787 has 8 divisors (see below), whose sum is σ = 260951198256. Its totient is φ = 253285062912.

The previous prime is 257113870771. The next prime is 257113870807. The reversal of 257113870787 is 787078311752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 257113870787 - 2⁴ = 257113870771 is a prime.

It is a super-2 number, since 2×257113870787² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257113870687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2069078 + ... + 2189819.

It is an arithmetic number, because the mean of its divisors is an integer number (32618899782).

Almost surely, 2^257113870787 is an apocalyptic number.

257113870787 is a deficient number, since it is larger than the sum of its proper divisors (3837327469).

257113870787 is an equidigital number, since it uses as much as digits as its factorization.

257113870787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4259797.

The product of its (nonzero) digits is 4609920, while the sum is 56.

The spelling of 257113870787 in words is "two hundred fifty-seven billion, one hundred thirteen million, eight hundred seventy thousand, seven hundred eighty-seven".