72638189480 has 16 divisors (see below), whose sum is σ = 163435926420. Its totient is φ = 29055275776.

The previous prime is 72638189479. The next prime is 72638189513. The reversal of 72638189480 is 8498183627.

It can be written as a sum of positive squares in 2 ways, for example, as 62103630436 + 10534559044 = 249206^2 + 102638^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 907977329 + ... + 907977408.

Almost surely, 2^72638189480 is an apocalyptic number.

It is an amenable number.

72638189480 is an abundant number, since it is smaller than the sum of its proper divisors (90797736940).

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

72638189480 is a wasteful number, since it uses less digits than its factorization.

72638189480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1815954748 (or 1815954744 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 56.

The spelling of 72638189480 in words is "seventy-two billion, six hundred thirty-eight million, one hundred eighty-nine thousand, four hundred eighty".