654556401 has 6 divisors (see below), whose sum is σ = 945470370. Its totient is φ = 436370928.

The previous prime is 654556391. The next prime is 654556429. The reversal of 654556401 is 104655456.

654556401 is a `hidden beast` number, since 6 + 5 + 4 + 5 + 5 + 640 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 621205776 + 33350625 = 24924^2 + 5775^2 .

It is not a de Polignac number, because 654556401 - 2⁵ = 654556369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (654556601) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36364236 + ... + 36364253.

It is an arithmetic number, because the mean of its divisors is an integer number (157578395).

Almost surely, 2^654556401 is an apocalyptic number.

It is an amenable number.

654556401 is a deficient number, since it is larger than the sum of its proper divisors (290913969).

654556401 is a wasteful number, since it uses less digits than its factorization.

654556401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72728495 (or 72728492 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 654556401 is about 25584.2998927076. The cubic root of 654556401 is about 868.2584622684.

The spelling of 654556401 in words is "six hundred fifty-four million, five hundred fifty-six thousand, four hundred one".