78417672580 has 24 divisors (see below), whose sum is σ = 177344583192. Its totient is φ = 28954217472.

The previous prime is 78417672577. The next prime is 78417672583. The reversal of 78417672580 is 8527671487.

It is an interprime number because it is at equal distance from previous prime (78417672577) and next prime (78417672583).

It can be written as a sum of positive squares in 4 ways, for example, as 281769796 + 78135902784 = 16786^2 + 279528^2 .

It is a super-2 number, since 2×78417672580² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78417672583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150802957 + ... + 150803476.

It is an arithmetic number, because the mean of its divisors is an integer number (7389357633).

Almost surely, 2^78417672580 is an apocalyptic number.

It is an amenable number.

78417672580 is an abundant number, since it is smaller than the sum of its proper divisors (98926910612).

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

78417672580 is a wasteful number, since it uses less digits than its factorization.

78417672580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301606455 (or 301606453 counting only the distinct ones).

The product of its (nonzero) digits is 5268480, while the sum is 55.

The spelling of 78417672580 in words is "seventy-eight billion, four hundred seventeen million, six hundred seventy-two thousand, five hundred eighty".