78271519520 has 48 divisors (see below), whose sum is σ = 186266272248. Its totient is φ = 31080069120.

The previous prime is 78271519499. The next prime is 78271519549. The reversal of 78271519520 is 2591517287.

It can be written as a sum of positive squares in 4 ways, for example, as 49285776016 + 28985743504 = 222004^2 + 170252^2 .

It is a super-2 number, since 2×78271519520² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1763471 + ... + 1807310.

Almost surely, 2^78271519520 is an apocalyptic number.

It is an amenable number.

78271519520 is an abundant number, since it is smaller than the sum of its proper divisors (107994752728).

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

78271519520 is a wasteful number, since it uses less digits than its factorization.

78271519520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3570933 (or 3570925 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 47.

The spelling of 78271519520 in words is "seventy-eight billion, two hundred seventy-one million, five hundred nineteen thousand, five hundred twenty".