772720647501440 has 128 divisors (see below), whose sum is σ = 2017748846977920. Its totient is φ = 280636765573120.

The previous prime is 772720647501433. The next prime is 772720647501469. The reversal of 772720647501440 is 44105746027277.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63248252 + ... + 74470011.

It is an arithmetic number, because the mean of its divisors is an integer number (15763662867015).

Almost surely, 2^{772720647501440} is an apocalyptic number.

It is an amenable number.

772720647501440 is an abundant number, since it is smaller than the sum of its proper divisors (1245028199476480).

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

772720647501440 is a wasteful number, since it uses less digits than its factorization.

772720647501440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137719090 (or 137719078 counting only the distinct ones).

The product of its (nonzero) digits is 18439680, while the sum is 56.

The spelling of 772720647501440 in words is "seven hundred seventy-two trillion, seven hundred twenty billion, six hundred forty-seven million, five hundred one thousand, four hundred forty".