72930243136 has 21 divisors (see below), whose sum is σ = 144725238489. Its totient is φ = 36464041344.

The previous prime is 72930243109. The next prime is 72930243137. The reversal of 72930243136 is 63134203927.

The square root of 72930243136 is 270056.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 45950209600 + 26980033536 = 214360^2 + 164256^2 .

It is a super-2 number, since 2×72930243136² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72930243137) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2143570 + ... + 2177326.

Almost surely, 2^72930243136 is an apocalyptic number.

72930243136 is the 270056-th square number.

It is an amenable number.

72930243136 is a deficient number, since it is larger than the sum of its proper divisors (71794995353).

72930243136 is an frugal number, since it uses more digits than its factorization.

72930243136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67526 (or 33759 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 40.

The spelling of 72930243136 in words is "seventy-two billion, nine hundred thirty million, two hundred forty-three thousand, one hundred thirty-six".