78260987368 has 8 divisors (see below), whose sum is σ = 146739351330. Its totient is φ = 39130493680.

The previous prime is 78260987309. The next prime is 78260987407. The reversal of 78260987368 is 86378906287.

It can be written as a sum of positive squares in only one way, i.e., 74551933764 + 3709053604 = 273042^2 + 60902^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×78260987368² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4891311703 + ... + 4891311718.

Almost surely, 2^78260987368 is an apocalyptic number.

It is an amenable number.

78260987368 is a deficient number, since it is larger than the sum of its proper divisors (68478363962).

78260987368 is a wasteful number, since it uses less digits than its factorization.

78260987368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9782623427 (or 9782623423 counting only the distinct ones).

The product of its (nonzero) digits is 48771072, while the sum is 64.

The spelling of 78260987368 in words is "seventy-eight billion, two hundred sixty million, nine hundred eighty-seven thousand, three hundred sixty-eight".