642412554 has 16 divisors (see below), whose sum is σ = 1468371648. Its totient is φ = 183546432.

The previous prime is 642412531. The next prime is 642412567. The reversal of 642412554 is 455214246.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7647727 + ... + 7647810.

It is an arithmetic number, because the mean of its divisors is an integer number (91773228).

Almost surely, 2^642412554 is an apocalyptic number.

642412554 is an abundant number, since it is smaller than the sum of its proper divisors (825959094).

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

642412554 is a wasteful number, since it uses less digits than its factorization.

642412554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15295549.

The product of its digits is 38400, while the sum is 33.

The square root of 642412554 is about 25345.8587149854. The cubic root of 642412554 is about 862.8553702991.

It can be divided in two parts, 64241 and 2554, that added together give a triangular number (66795 = T₃₆₅).

The spelling of 642412554 in words is "six hundred forty-two million, four hundred twelve thousand, five hundred fifty-four".