642324632642 has 64 divisors (see below), whose sum is σ = 1212673524480. Its totient is φ = 247873996800.

The previous prime is 642324632557. The next prime is 642324632669. The reversal of 642324632642 is 246236423246.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 642324632593 and 642324632602.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70110542 + ... + 70119702.

It is an arithmetic number, because the mean of its divisors is an integer number (18948023820).

Almost surely, 2^642324632642 is an apocalyptic number.

642324632642 is a deficient number, since it is larger than the sum of its proper divisors (570348891838).

642324632642 is a wasteful number, since it uses less digits than its factorization.

642324632642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13467.

The product of its digits is 1990656, while the sum is 44.

The spelling of 642324632642 in words is "six hundred forty-two billion, three hundred twenty-four million, six hundred thirty-two thousand, six hundred forty-two".