642630233015401 has 4 divisors (see below), whose sum is σ = 642632311090900. Its totient is φ = 642628154939904.

The previous prime is 642630233015387. The next prime is 642630233015411. The reversal of 642630233015401 is 104510332036246.

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

It can be written as a sum of positive squares in 2 ways, for example, as 600268424141376 + 42361808874025 = 24500376^2 + 6508595^2 .

It is a cyclic number.

It is not a de Polignac number, because 642630233015401 - 2⁵ = 642630233015369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642630233015411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1038573816 + ... + 1039192393.

It is an arithmetic number, because the mean of its divisors is an integer number (160658077772725).

Almost surely, 2^{642630233015401} is an apocalyptic number.

It is an amenable number.

642630233015401 is a deficient number, since it is larger than the sum of its proper divisors (2078075499).

642630233015401 is a wasteful number, since it uses less digits than its factorization.

642630233015401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2078075498.

The product of its (nonzero) digits is 311040, while the sum is 40.

The spelling of 642630233015401 in words is "six hundred forty-two trillion, six hundred thirty billion, two hundred thirty-three million, fifteen thousand, four hundred one".