642458130455 has 4 divisors (see below), whose sum is σ = 770949756552. Its totient is φ = 513966504360.

The previous prime is 642458130443. The next prime is 642458130467. The reversal of 642458130455 is 554031854246.

642458130455 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (642458130443) and next prime (642458130467).

It is a de Polignac number, because none of the positive numbers 2^k-642458130455 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64245813041 + ... + 64245813050.

It is an arithmetic number, because the mean of its divisors is an integer number (192737439138).

Almost surely, 2^642458130455 is an apocalyptic number.

642458130455 is a deficient number, since it is larger than the sum of its proper divisors (128491626097).

642458130455 is a wasteful number, since it uses less digits than its factorization.

642458130455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128491626096.

The product of its (nonzero) digits is 2304000, while the sum is 47.

The spelling of 642458130455 in words is "six hundred forty-two billion, four hundred fifty-eight million, one hundred thirty thousand, four hundred fifty-five".