655412478 has 32 divisors (see below), whose sum is σ = 1546414080. Its totient is φ = 181219680.

The previous prime is 655412477. The next prime is 655412497. The reversal of 655412478 is 874214556.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655412477) 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, 250393 + ... + 252996.

It is an arithmetic number, because the mean of its divisors is an integer number (48325440).

Almost surely, 2^655412478 is an apocalyptic number.

655412478 is an abundant number, since it is smaller than the sum of its proper divisors (891001602).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

655412478 is a wasteful number, since it uses less digits than its factorization.

655412478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503432.

The product of its digits is 268800, while the sum is 42.

The square root of 655412478 is about 25601.0249404199. The cubic root of 655412478 is about 868.6368214584.

The spelling of 655412478 in words is "six hundred fifty-five million, four hundred twelve thousand, four hundred seventy-eight".