78417876802 has 4 divisors (see below), whose sum is σ = 117626815206. Its totient is φ = 39208938400.

The previous prime is 78417876767. The next prime is 78417876827. The reversal of 78417876802 is 20867871487.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 50042137401 + 28375739401 = 223701^2 + 168451^2 .

It is a super-2 number, since 2×78417876802² (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, 19604469199 + ... + 19604469202.

Almost surely, 2^78417876802 is an apocalyptic number.

78417876802 is a deficient number, since it is larger than the sum of its proper divisors (39208938404).

78417876802 is a wasteful number, since it uses less digits than its factorization.

78417876802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39208938403.

The product of its (nonzero) digits is 8429568, while the sum is 58.

The spelling of 78417876802 in words is "seventy-eight billion, four hundred seventeen million, eight hundred seventy-six thousand, eight hundred two".