2155672557 has 12 divisors (see below), whose sum is σ = 3166525440. Its totient is φ = 1412756808.

The previous prime is 2155672501. The next prime is 2155672579. The reversal of 2155672557 is 7552765512.

2155672557 is a `hidden beast` number, since 2 + 15 + 567 + 25 + 57 = 666.

It is not a de Polignac number, because 2155672557 - 2²² = 2151478253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155674557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2029293 + ... + 2030354.

It is an arithmetic number, because the mean of its divisors is an integer number (263877120).

Almost surely, 2^2155672557 is an apocalyptic number.

It is an amenable number.

2155672557 is a deficient number, since it is larger than the sum of its proper divisors (1010852883).

2155672557 is a wasteful number, since it uses less digits than its factorization.

2155672557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4059712 (or 4059709 counting only the distinct ones).

The product of its digits is 735000, while the sum is 45.

The square root of 2155672557 is about 46429.2209389733. The cubic root of 2155672557 is about 1291.7969782387.

The spelling of 2155672557 in words is "two billion, one hundred fifty-five million, six hundred seventy-two thousand, five hundred fifty-seven".