73647254421 has 48 divisors (see below), whose sum is σ = 117731630016. Its totient is φ = 44076711168.

The previous prime is 73647254389. The next prime is 73647254519. The reversal of 73647254421 is 12445274637.

73647254421 is a `hidden beast` number, since 7 + 36 + 4 + 72 + 544 + 2 + 1 = 666.

It is not a de Polignac number, because 73647254421 - 2⁵ = 73647254389 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73647259421) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1140810 + ... + 1203636.

It is an arithmetic number, because the mean of its divisors is an integer number (2452742292).

Almost surely, 2^73647254421 is an apocalyptic number.

It is an amenable number.

73647254421 is a deficient number, since it is larger than the sum of its proper divisors (44084375595).

73647254421 is a wasteful number, since it uses less digits than its factorization.

73647254421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63122 (or 63119 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 45.

The spelling of 73647254421 in words is "seventy-three billion, six hundred forty-seven million, two hundred fifty-four thousand, four hundred twenty-one".