78505013552 has 160 divisors (see below), whose sum is σ = 182113296384. Its totient is φ = 32078592000.

The previous prime is 78505013533. The next prime is 78505013611. The reversal of 78505013552 is 25531050587.

It is a super-3 number, since 3×78505013552³ (a number of 34 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71824718 + ... + 71825810.

Almost surely, 2^78505013552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78505013552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91056648192).

78505013552 is an abundant number, since it is smaller than the sum of its proper divisors (103608282832).

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

78505013552 is a wasteful number, since it uses less digits than its factorization.

78505013552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427 (or 1421 counting only the distinct ones).

The product of its (nonzero) digits is 210000, while the sum is 41.

The spelling of 78505013552 in words is "seventy-eight billion, five hundred five million, thirteen thousand, five hundred fifty-two".