78401903934776 has 16 divisors (see below), whose sum is σ = 148125734535240. Its totient is φ = 38901708058720.

The previous prime is 78401903934763. The next prime is 78401903934797. The reversal of 78401903934776 is 67743930910487.

It is a super-2 number, since 2×78401903934776² (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, 37405487471 + ... + 37405489566.

Almost surely, 2^{78401903934776} is an apocalyptic number.

It is an amenable number.

78401903934776 is a deficient number, since it is larger than the sum of its proper divisors (69723830600464).

78401903934776 is a wasteful number, since it uses less digits than its factorization.

78401903934776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74810977174 (or 74810977170 counting only the distinct ones).

The product of its (nonzero) digits is 192036096, while the sum is 68.

The spelling of 78401903934776 in words is "seventy-eight trillion, four hundred one billion, nine hundred three million, nine hundred thirty-four thousand, seven hundred seventy-six".