2656957481 has 8 divisors (see below), whose sum is σ = 2722678728. Its totient is φ = 2591280000.

The previous prime is 2656957453. The next prime is 2656957543. The reversal of 2656957481 is 1847596562.

It can be written as a sum of positive squares in 4 ways, for example, as 182790400 + 2474167081 = 13520^2 + 49741^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2656957481 - 2⁶ = 2656957417 is a prime.

It is a super-2 number, since 2×2656957481² = 14118846111683730722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2656957411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136031 + ... + 154331.

It is an arithmetic number, because the mean of its divisors is an integer number (340334841).

Almost surely, 2^2656957481 is an apocalyptic number.

It is an amenable number.

2656957481 is a deficient number, since it is larger than the sum of its proper divisors (65721247).

2656957481 is a wasteful number, since it uses less digits than its factorization.

2656957481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21883.

The product of its digits is 3628800, while the sum is 53.

The square root of 2656957481 is about 51545.6834371221. The cubic root of 2656957481 is about 1385.0375086611.

The spelling of 2656957481 in words is "two billion, six hundred fifty-six million, nine hundred fifty-seven thousand, four hundred eighty-one".