642445545152 has 28 divisors (see below), whose sum is σ = 1275499278816. Its totient is φ = 321059900160.

The previous prime is 642445545149. The next prime is 642445545173. The reversal of 642445545152 is 251545544246.

It is a junction number, because it is equal to n+sod(n) for n = 642445545097 and 642445545106.

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, 2417624 + ... + 2670167.

It is an arithmetic number, because the mean of its divisors is an integer number (45553545672).

Almost surely, 2^642445545152 is an apocalyptic number.

It is an amenable number.

642445545152 is a deficient number, since it is larger than the sum of its proper divisors (633053733664).

642445545152 is a wasteful number, since it uses less digits than its factorization.

642445545152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5089776 (or 5089766 counting only the distinct ones).

The product of its digits is 3840000, while the sum is 47.

The spelling of 642445545152 in words is "six hundred forty-two billion, four hundred forty-five million, five hundred forty-five thousand, one hundred fifty-two".