78460936540 has 24 divisors (see below), whose sum is σ = 188306248032. Its totient is φ = 26900892480.

The previous prime is 78460936529. The next prime is 78460936571. The reversal of 78460936540 is 4563906487.

It is a super-2 number, since 2×78460936540² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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, 280217491 + ... + 280217770.

It is an arithmetic number, because the mean of its divisors is an integer number (7846093668).

Almost surely, 2^78460936540 is an apocalyptic number.

78460936540 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

78460936540 is an abundant number, since it is smaller than the sum of its proper divisors (109845311492).

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

78460936540 is a wasteful number, since it uses less digits than its factorization.

78460936540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560435277 (or 560435275 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 52.

The spelling of 78460936540 in words is "seventy-eight billion, four hundred sixty million, nine hundred thirty-six thousand, five hundred forty".