72736881630 has 64 divisors (see below), whose sum is σ = 199719433728. Its totient is φ = 16607859840.

The previous prime is 72736881619. The next prime is 72736881661. The reversal of 72736881630 is 3618863727.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13569 + ... + 381651.

It is an arithmetic number, because the mean of its divisors is an integer number (3120616152).

Almost surely, 2^72736881630 is an apocalyptic number.

72736881630 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

72736881630 is an abundant number, since it is smaller than the sum of its proper divisors (126982552098).

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

72736881630 is a wasteful number, since it uses less digits than its factorization.

72736881630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369041.

The product of its (nonzero) digits is 2032128, while the sum is 51.

The spelling of 72736881630 in words is "seventy-two billion, seven hundred thirty-six million, eight hundred eighty-one thousand, six hundred thirty".