656151955 has 4 divisors (see below), whose sum is σ = 787382352. Its totient is φ = 524921560.

The previous prime is 656151949. The next prime is 656151961. The reversal of 656151955 is 559151656.

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

It is an interprime number because it is at equal distance from previous prime (656151949) and next prime (656151961).

It is a de Polignac number, because none of the positive numbers 2^k-656151955 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65615191 + ... + 65615200.

It is an arithmetic number, because the mean of its divisors is an integer number (196845588).

Almost surely, 2^656151955 is an apocalyptic number.

656151955 is a deficient number, since it is larger than the sum of its proper divisors (131230397).

656151955 is a wasteful number, since it uses less digits than its factorization.

656151955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131230396.

The product of its digits is 202500, while the sum is 43.

The square root of 656151955 is about 25615.4632009652. The cubic root of 656151955 is about 868.9633819827.

The spelling of 656151955 in words is "six hundred fifty-six million, one hundred fifty-one thousand, nine hundred fifty-five".