18157300551 has 64 divisors (see below), whose sum is σ = 30955478400. Its totient is φ = 10419591168.

The previous prime is 18157300547. The next prime is 18157300559. The reversal of 18157300551 is 15500375181.

18157300551 is a `hidden beast` number, since 1 + 81 + 573 + 0 + 0 + 5 + 5 + 1 = 666.

It is not a de Polignac number, because 18157300551 - 2² = 18157300547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18157300559) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 636445 + ... + 664361.

It is an arithmetic number, because the mean of its divisors is an integer number (483679350).

Almost surely, 2^18157300551 is an apocalyptic number.

18157300551 is a deficient number, since it is larger than the sum of its proper divisors (12798177849).

18157300551 is a wasteful number, since it uses less digits than its factorization.

18157300551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28065 (or 28059 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 36.

The spelling of 18157300551 in words is "eighteen billion, one hundred fifty-seven million, three hundred thousand, five hundred fifty-one".