78287310752680 has 32 divisors (see below), whose sum is σ = 176146960019400. Its totient is φ = 31314833487616.

The previous prime is 78287310752671. The next prime is 78287310752713. The reversal of 78287310752680 is 8625701378287.

It can be written as a sum of positive squares in 4 ways, for example, as 61680006810244 + 16607303942436 = 7853662^2 + 4075206^2 .

It is a super-2 number, since 2×78287310752680² (a number of 29 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, 12098034 + ... + 17405086.

Almost surely, 2^{78287310752680} is an apocalyptic number.

It is an amenable number.

78287310752680 is an abundant number, since it is smaller than the sum of its proper divisors (97859649266720).

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

78287310752680 is a wasteful number, since it uses less digits than its factorization.

78287310752680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5675853 (or 5675849 counting only the distinct ones).

The product of its (nonzero) digits is 63221760, while the sum is 64.

The spelling of 78287310752680 in words is "seventy-eight trillion, two hundred eighty-seven billion, three hundred ten million, seven hundred fifty-two thousand, six hundred eighty".