157772661111 has 80 divisors (see below), whose sum is σ = 275792957440. Its totient is φ = 89013349440.

The previous prime is 157772661097. The next prime is 157772661113. The reversal of 157772661111 is 111166277751.

157772661111 is a `hidden beast` number, since 1 + 5 + 7 + 7 + 7 + 26 + 611 + 1 + 1 = 666.

It is not a de Polignac number, because 157772661111 - 2⁶ = 157772661047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157772661113) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 493026 + ... + 747408.

It is an arithmetic number, because the mean of its divisors is an integer number (3447411968).

Almost surely, 2^157772661111 is an apocalyptic number.

157772661111 is a deficient number, since it is larger than the sum of its proper divisors (118020296329).

157772661111 is a wasteful number, since it uses less digits than its factorization.

157772661111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254458 (or 254449 counting only the distinct ones).

The product of its digits is 123480, while the sum is 45.

The spelling of 157772661111 in words is "one hundred fifty-seven billion, seven hundred seventy-two million, six hundred sixty-one thousand, one hundred eleven".