642554455246 has 32 divisors (see below), whose sum is σ = 1054981630080. Its totient is φ = 291091600800.

The previous prime is 642554455183. The next prime is 642554455253.

642554455246 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 642554455193 and 642554455202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7914085 + ... + 7994863.

It is an arithmetic number, because the mean of its divisors is an integer number (32968175940).

Almost surely, 2^642554455246 is an apocalyptic number.

642554455246 is a deficient number, since it is larger than the sum of its proper divisors (412427174834).

642554455246 is a wasteful number, since it uses less digits than its factorization.

642554455246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82000.

The product of its digits is 23040000, while the sum is 52.

The spelling of 642554455246 in words is "six hundred forty-two billion, five hundred fifty-four million, four hundred fifty-five thousand, two hundred forty-six".