76861661455810 has 48 divisors (see below), whose sum is σ = 173796285757248. Its totient is φ = 23956881490080.

The previous prime is 76861661455801. The next prime is 76861661455847. The reversal of 76861661455810 is 1855416616867.

It is a super-2 number, since 2×76861661455810² (a number of 29 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (64) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4537279692 + ... + 4537296631.

It is an arithmetic number, because the mean of its divisors is an integer number (3620755953276).

Almost surely, 2^{76861661455810} is an apocalyptic number.

76861661455810 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

76861661455810 is an abundant number, since it is smaller than the sum of its proper divisors (96934624301438).

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

76861661455810 is a wasteful number, since it uses less digits than its factorization.

76861661455810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9074576359 (or 9074576348 counting only the distinct ones).

The product of its (nonzero) digits is 58060800, while the sum is 64.

The spelling of 76861661455810 in words is "seventy-six trillion, eight hundred sixty-one billion, six hundred sixty-one million, four hundred fifty-five thousand, eight hundred ten".