73640404425 has 48 divisors (see below), whose sum is σ = 142539126912. Its totient is φ = 32843097600.

The previous prime is 73640404379. The next prime is 73640404441. The reversal of 73640404425 is 52440404637.

It is not a de Polignac number, because 73640404425 - 2⁶ = 73640404361 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1689054 + ... + 1732103.

It is an arithmetic number, because the mean of its divisors is an integer number (2969565144).

Almost surely, 2^73640404425 is an apocalyptic number.

73640404425 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

73640404425 is a deficient number, since it is larger than the sum of its proper divisors (68898722487).

73640404425 is a wasteful number, since it uses less digits than its factorization.

73640404425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3421218 (or 3421213 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 39.

The spelling of 73640404425 in words is "seventy-three billion, six hundred forty million, four hundred four thousand, four hundred twenty-five".