78380805507 has 16 divisors (see below), whose sum is σ = 114791112960. Its totient is φ = 47351332512.

The previous prime is 78380805487. The next prime is 78380805539. The reversal of 78380805507 is 70550808387.

It is not a de Polignac number, because 78380805507 - 2¹⁹ = 78380281219 is a prime.

It is a super-2 number, since 2×78380805507² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78380805507.

It is not an unprimeable number, because it can be changed into a prime (78380805577) 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, 29892208 + ... + 29894829.

It is an arithmetic number, because the mean of its divisors is an integer number (7174444560).

Almost surely, 2^78380805507 is an apocalyptic number.

78380805507 is a deficient number, since it is larger than the sum of its proper divisors (36410307453).

78380805507 is a wasteful number, since it uses less digits than its factorization.

78380805507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59787082.

The product of its (nonzero) digits is 1881600, while the sum is 51.

The spelling of 78380805507 in words is "seventy-eight billion, three hundred eighty million, eight hundred five thousand, five hundred seven".