655400406023 has 16 divisors (see below), whose sum is σ = 720533990400. Its totient is φ = 591208437600.

The previous prime is 655400406013. The next prime is 655400406043. The reversal of 655400406023 is 320604004556.

It is a happy number.

It is not a de Polignac number, because 655400406023 - 2²² = 655396211719 is a prime.

It is a super-2 number, since 2×655400406023² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655400406013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 395453 + ... + 1211273.

It is an arithmetic number, because the mean of its divisors is an integer number (45033374400).

Almost surely, 2^655400406023 is an apocalyptic number.

655400406023 is a deficient number, since it is larger than the sum of its proper divisors (65133584377).

655400406023 is a wasteful number, since it uses less digits than its factorization.

655400406023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816398.

The product of its (nonzero) digits is 86400, while the sum is 35.

The spelling of 655400406023 in words is "six hundred fifty-five billion, four hundred million, four hundred six thousand, twenty-three".