1255357721157 has 8 divisors (see below), whose sum is σ = 1689453382176. Its totient is φ = 829083603792.

The previous prime is 1255357721141. The next prime is 1255357721179. The reversal of 1255357721157 is 7511277535521.

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

It is not a de Polignac number, because 1255357721157 - 2⁴ = 1255357721141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255357726157) 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, 1955385538 + ... + 1955386179.

It is an arithmetic number, because the mean of its divisors is an integer number (211181672772).

Almost surely, 2^{1255357721157} is an apocalyptic number.

It is an amenable number.

1255357721157 is a deficient number, since it is larger than the sum of its proper divisors (434095661019).

1255357721157 is a wasteful number, since it uses less digits than its factorization.

1255357721157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3910771827.

The product of its digits is 2572500, while the sum is 51.

The spelling of 1255357721157 in words is "one trillion, two hundred fifty-five billion, three hundred fifty-seven million, seven hundred twenty-one thousand, one hundred fifty-seven".