78517101952 has 32 divisors (see below), whose sum is σ = 165622016520. Its totient is φ = 36949223424.

The previous prime is 78517101877. The next prime is 78517101961. The reversal of 78517101952 is 25910171587.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18039438 + ... + 18043789.

Almost surely, 2^78517101952 is an apocalyptic number.

It is an amenable number.

78517101952 is an abundant number, since it is smaller than the sum of its proper divisors (87104914568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78517101952 is a wasteful number, since it uses less digits than its factorization.

78517101952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36083258 (or 36083246 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 46.

The spelling of 78517101952 in words is "seventy-eight billion, five hundred seventeen million, one hundred one thousand, nine hundred fifty-two".