77727350401644 has 96 divisors (see below), whose sum is σ = 187698445627392. Its totient is φ = 25008557184000.

The previous prime is 77727350401619. The next prime is 77727350401651. The reversal of 77727350401644 is 44610405372777.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 292717224 + ... + 292982640.

It is an arithmetic number, because the mean of its divisors is an integer number (1955192141952).

Almost surely, 2^{77727350401644} is an apocalyptic number.

It is an amenable number.

77727350401644 is an abundant number, since it is smaller than the sum of its proper divisors (109971095225748).

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

77727350401644 is a wasteful number, since it uses less digits than its factorization.

77727350401644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267487 (or 267485 counting only the distinct ones).

The product of its (nonzero) digits is 27659520, while the sum is 57.

The spelling of 77727350401644 in words is "seventy-seven trillion, seven hundred twenty-seven billion, three hundred fifty million, four hundred one thousand, six hundred forty-four".