77409091632 has 40 divisors (see below), whose sum is σ = 206424248320. Its totient is φ = 24970674240.

The previous prime is 77409091589. The next prime is 77409091633. The reversal of 77409091632 is 23619090477.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (77409091633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26009632 + ... + 26012607.

It is an arithmetic number, because the mean of its divisors is an integer number (5160606208).

Almost surely, 2^77409091632 is an apocalyptic number.

It is an amenable number.

77409091632 is an abundant number, since it is smaller than the sum of its proper divisors (129015156688).

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

77409091632 is a wasteful number, since it uses less digits than its factorization.

77409091632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52022281 (or 52022275 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 48.

The spelling of 77409091632 in words is "seventy-seven billion, four hundred nine million, ninety-one thousand, six hundred thirty-two".