642623253354 has 24 divisors (see below), whose sum is σ = 1395822593412. Its totient is φ = 213673564800.

The previous prime is 642623253343. The next prime is 642623253421. The reversal of 642623253354 is 453352326246.

It is a happy number.

642623253354 is a `hidden beast` number, since 6 + 4 + 2 + 62 + 3 + 2 + 533 + 54 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 526897419129 + 115725834225 = 725877^2 + 340185^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44508109 + ... + 44522544.

Almost surely, 2^642623253354 is an apocalyptic number.

642623253354 is an abundant number, since it is smaller than the sum of its proper divisors (753199340058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642623253354 is a wasteful number, since it uses less digits than its factorization.

642623253354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89031062 (or 89031059 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 45.

The spelling of 642623253354 in words is "six hundred forty-two billion, six hundred twenty-three million, two hundred fifty-three thousand, three hundred fifty-four".