1257168879951 has 8 divisors (see below), whose sum is σ = 1676276407344. Its totient is φ = 838086969600.

The previous prime is 1257168879931. The next prime is 1257168879971. The reversal of 1257168879951 is 1599788617521.

It is an interprime number because it is at equal distance from previous prime (1257168879931) and next prime (1257168879971).

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

It is not a de Polignac number, because 1257168879951 - 2⁵ = 1257168879919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1257168879931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6289456 + ... + 6486261.

It is an arithmetic number, because the mean of its divisors is an integer number (209534550918).

Almost surely, 2^{1257168879951} is an apocalyptic number.

1257168879951 is a deficient number, since it is larger than the sum of its proper divisors (419107527393).

1257168879951 is a wasteful number, since it uses less digits than its factorization.

1257168879951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12808521.

The product of its digits is 76204800, while the sum is 69.

The spelling of 1257168879951 in words is "one trillion, two hundred fifty-seven billion, one hundred sixty-eight million, eight hundred seventy-nine thousand, nine hundred fifty-one".