77846231540 has 48 divisors (see below), whose sum is σ = 203815592064. Its totient is φ = 24263760000.

The previous prime is 77846231431. The next prime is 77846231543. The reversal of 77846231540 is 4513264877.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77846231543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25273211 + ... + 25276290.

It is an arithmetic number, because the mean of its divisors is an integer number (4246158168).

Almost surely, 2^77846231540 is an apocalyptic number.

77846231540 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

77846231540 is an abundant number, since it is smaller than the sum of its proper divisors (125969360524).

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

77846231540 is a wasteful number, since it uses less digits than its factorization.

77846231540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50549528 (or 50549526 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 47.

The spelling of 77846231540 in words is "seventy-seven billion, eight hundred forty-six million, two hundred thirty-one thousand, five hundred forty".