72431689454 has 4 divisors (see below), whose sum is σ = 108647534184. Its totient is φ = 36215844726.

The previous prime is 72431689433. The next prime is 72431689483. The reversal of 72431689454 is 45498613427.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 72431689396 and 72431689405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18107922362 + ... + 18107922365.

It is an arithmetic number, because the mean of its divisors is an integer number (27161883546).

Almost surely, 2^72431689454 is an apocalyptic number.

72431689454 is a deficient number, since it is larger than the sum of its proper divisors (36215844730).

72431689454 is a wasteful number, since it uses less digits than its factorization.

72431689454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36215844729.

The product of its digits is 5806080, while the sum is 53.

The spelling of 72431689454 in words is "seventy-two billion, four hundred thirty-one million, six hundred eighty-nine thousand, four hundred fifty-four".