656161151 has 4 divisors (see below), whose sum is σ = 656510400. Its totient is φ = 655811904.

The previous prime is 656161117. The next prime is 656161169. The reversal of 656161151 is 151161656.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-656161151 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 (656161651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171791 + ... + 175568.

It is an arithmetic number, because the mean of its divisors is an integer number (164127600).

Almost surely, 2^656161151 is an apocalyptic number.

656161151 is a deficient number, since it is larger than the sum of its proper divisors (349249).

656161151 is a wasteful number, since it uses less digits than its factorization.

656161151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349248.

The product of its digits is 5400, while the sum is 32.

The square root of 656161151 is about 25615.6427012870. The cubic root of 656161151 is about 868.9674414844.

The spelling of 656161151 in words is "six hundred fifty-six million, one hundred sixty-one thousand, one hundred fifty-one".