656041555 has 32 divisors (see below), whose sum is σ = 869891904. Its totient is φ = 472006656.

The previous prime is 656041541. The next prime is 656041571. The reversal of 656041555 is 555140656.

656041555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 656041555 - 2⁵ = 656041523 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 421659 + ... + 423211.

It is an arithmetic number, because the mean of its divisors is an integer number (27184122).

Almost surely, 2^656041555 is an apocalyptic number.

656041555 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

656041555 is a deficient number, since it is larger than the sum of its proper divisors (213850349).

656041555 is a wasteful number, since it uses less digits than its factorization.

656041555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1735.

The product of its (nonzero) digits is 90000, while the sum is 37.

The square root of 656041555 is about 25613.3081619692. The cubic root of 656041555 is about 868.9146438119.

The spelling of 656041555 in words is "six hundred fifty-six million, forty-one thousand, five hundred fifty-five".