78678518601 has 24 divisors (see below), whose sum is σ = 112186641600. Its totient is φ = 49035511552.

The previous prime is 78678518573. The next prime is 78678518623. The reversal of 78678518601 is 10681587687.

It is not a de Polignac number, because 78678518601 - 2²² = 78674324297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78678518101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 175341 + ... + 433706.

It is an arithmetic number, because the mean of its divisors is an integer number (4674443400).

Almost surely, 2^78678518601 is an apocalyptic number.

It is an amenable number.

78678518601 is a deficient number, since it is larger than the sum of its proper divisors (33508122999).

78678518601 is a wasteful number, since it uses less digits than its factorization.

78678518601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609233 (or 609216 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 57.

The spelling of 78678518601 in words is "seventy-eight billion, six hundred seventy-eight million, five hundred eighteen thousand, six hundred one".