655957481 has 4 divisors (see below), whose sum is σ = 656032512. Its totient is φ = 655882452.

The previous prime is 655957453. The next prime is 655957499. The reversal of 655957481 is 184759556.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-655957481 is a prime.

It is a super-2 number, since 2×655957481² = 860560433759730722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655957411) 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, 22361 + ... + 42566.

It is an arithmetic number, because the mean of its divisors is an integer number (164008128).

Almost surely, 2^655957481 is an apocalyptic number.

It is an amenable number.

655957481 is a deficient number, since it is larger than the sum of its proper divisors (75031).

655957481 is a wasteful number, since it uses less digits than its factorization.

655957481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75030.

The product of its digits is 1512000, while the sum is 50.

The square root of 655957481 is about 25611.6668922583. Note that the first 3 decimals coincide. The cubic root of 655957481 is about 868.8775240847.

The spelling of 655957481 in words is "six hundred fifty-five million, nine hundred fifty-seven thousand, four hundred eighty-one".