27777001157 has 8 divisors (see below), whose sum is σ = 28789457400. Its totient is φ = 26778320064.

The previous prime is 27777001141. The next prime is 27777001159. The reversal of 27777001157 is 75110077772.

It can be written as a sum of positive squares in 4 ways, for example, as 9910401601 + 17866599556 = 99551^2 + 133666^2 .

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 27777001157 - 2⁴ = 27777001141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27777001159) 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, 3439682 + ... + 3447747.

It is an arithmetic number, because the mean of its divisors is an integer number (3598682175).

Almost surely, 2^27777001157 is an apocalyptic number.

It is an amenable number.

27777001157 is a deficient number, since it is larger than the sum of its proper divisors (1012456243).

27777001157 is a wasteful number, since it uses less digits than its factorization.

27777001157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6887575.

The product of its (nonzero) digits is 168070, while the sum is 44.

The spelling of 27777001157 in words is "twenty-seven billion, seven hundred seventy-seven million, one thousand, one hundred fifty-seven".