78530772352 has 16 divisors (see below), whose sum is σ = 156448023300. Its totient is φ = 39265386112.

The previous prime is 78530772337. The next prime is 78530772377. The reversal of 78530772352 is 25327703587.

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-2 number, since 2×78530772352² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78530772296 and 78530772305.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306760702 + ... + 306760957.

Almost surely, 2^78530772352 is an apocalyptic number.

It is an amenable number.

78530772352 is a deficient number, since it is larger than the sum of its proper divisors (77917250948).

78530772352 is an equidigital number, since it uses as much as digits as its factorization.

78530772352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613521673 (or 613521661 counting only the distinct ones).

The product of its (nonzero) digits is 2469600, while the sum is 49.

The spelling of 78530772352 in words is "seventy-eight billion, five hundred thirty million, seven hundred seventy-two thousand, three hundred fifty-two".