642524256061 has 8 divisors (see below), whose sum is σ = 644021411904. Its totient is φ = 641027499360.

The previous prime is 642524256029. The next prime is 642524256133. The reversal of 642524256061 is 160652425246.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 642524256061 - 2⁵ = 642524256029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 642524255999 and 642524256017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642524254061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3254376 + ... + 3446158.

It is an arithmetic number, because the mean of its divisors is an integer number (80502676488).

Almost surely, 2^642524256061 is an apocalyptic number.

It is an amenable number.

642524256061 is a deficient number, since it is larger than the sum of its proper divisors (1497155843).

642524256061 is a wasteful number, since it uses less digits than its factorization.

642524256061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199571.

The product of its (nonzero) digits is 691200, while the sum is 43.

The spelling of 642524256061 in words is "six hundred forty-two billion, five hundred twenty-four million, two hundred fifty-six thousand, sixty-one".