78077532580 has 48 divisors (see below), whose sum is σ = 172641490560. Its totient is φ = 29578867200.

The previous prime is 78077532509. The next prime is 78077532587. The reversal of 78077532580 is 8523577087.

It is a happy number.

It is a super-2 number, since 2×78077532580² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78077532587) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1401865 + ... + 1456495.

It is an arithmetic number, because the mean of its divisors is an integer number (3596697720).

Almost surely, 2^78077532580 is an apocalyptic number.

It is an amenable number.

78077532580 is an abundant number, since it is smaller than the sum of its proper divisors (94563957980).

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

78077532580 is a wasteful number, since it uses less digits than its factorization.

78077532580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58420 (or 58418 counting only the distinct ones).

The product of its (nonzero) digits is 3292800, while the sum is 52.

The spelling of 78077532580 in words is "seventy-eight billion, seventy-seven million, five hundred thirty-two thousand, five hundred eighty".