77898040892 has 12 divisors (see below), whose sum is σ = 155796081840. Its totient is φ = 33384874656.

The previous prime is 77898040873. The next prime is 77898040919. The reversal of 77898040892 is 29804089877.

77898040892 is an admirable number.

It is a hoax number, since the sum of its digits (62) coincides with the sum of the digits of its distinct prime factors.

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, 1391036417 + ... + 1391036472.

It is an arithmetic number, because the mean of its divisors is an integer number (12983006820).

Almost surely, 2^77898040892 is an apocalyptic number.

It is an amenable number.

77898040892 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

77898040892 is a wasteful number, since it uses less digits than its factorization.

77898040892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2782072900 (or 2782072898 counting only the distinct ones).

The product of its (nonzero) digits is 16257024, while the sum is 62.

The spelling of 77898040892 in words is "seventy-seven billion, eight hundred ninety-eight million, forty thousand, eight hundred ninety-two".