78215020272 has 30 divisors (see below), whose sum is σ = 218893425192. Its totient is φ = 26071673376.

The previous prime is 78215020259. The next prime is 78215020277. The reversal of 78215020272 is 27202051287.

78215020272 is a `hidden beast` number, since 7 + 82 + 1 + 502 + 0 + 2 + 72 = 666.

It is a super-2 number, since 2×78215020272² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78215020277) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 271579788 + ... + 271580075.

Almost surely, 2^78215020272 is an apocalyptic number.

78215020272 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

78215020272 is an abundant number, since it is smaller than the sum of its proper divisors (140678404920).

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

78215020272 is a wasteful number, since it uses less digits than its factorization.

78215020272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543159877 (or 543159868 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 36.

The spelling of 78215020272 in words is "seventy-eight billion, two hundred fifteen million, twenty thousand, two hundred seventy-two".