642454100025 has 96 divisors (see below), whose sum is σ = 1099344280320. Its totient is φ = 330810117120.

The previous prime is 642454100009. The next prime is 642454100107. The reversal of 642454100025 is 520001454246.

It is not a de Polignac number, because 642454100025 - 2⁴ = 642454100009 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 239988987 + ... + 239991663.

It is an arithmetic number, because the mean of its divisors is an integer number (11451502920).

Almost surely, 2^642454100025 is an apocalyptic number.

It is an amenable number.

642454100025 is a deficient number, since it is larger than the sum of its proper divisors (456890180295).

642454100025 is a wasteful number, since it uses less digits than its factorization.

642454100025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3363 (or 3358 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 33.

The spelling of 642454100025 in words is "six hundred forty-two billion, four hundred fifty-four million, one hundred thousand, twenty-five".