78564830778488 has 16 divisors (see below), whose sum is σ = 151290383594280. Its totient is φ = 38220728486688.

The previous prime is 78564830778479. The next prime is 78564830778509. The reversal of 78564830778488 is 88487703846587.

It is a super-2 number, since 2×78564830778488² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132710862506 + ... + 132710863097.

Almost surely, 2^{78564830778488} is an apocalyptic number.

It is an amenable number.

78564830778488 is a deficient number, since it is larger than the sum of its proper divisors (72725552815792).

78564830778488 is a wasteful number, since it uses less digits than its factorization.

78564830778488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265421725646 (or 265421725642 counting only the distinct ones).

The product of its (nonzero) digits is 16184770560, while the sum is 83.

The spelling of 78564830778488 in words is "seventy-eight trillion, five hundred sixty-four billion, eight hundred thirty million, seven hundred seventy-eight thousand, four hundred eighty-eight".