77021709463790 has 96 divisors (see below), whose sum is σ = 174059772614784. Its totient is φ = 24322761146880.

The previous prime is 77021709463771. The next prime is 77021709463817. The reversal of 77021709463790 is 9736490712077.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10317926 + ... + 16140105.

It is an arithmetic number, because the mean of its divisors is an integer number (1813122631404).

Almost surely, 2^{77021709463790} is an apocalyptic number.

77021709463790 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

77021709463790 is an abundant number, since it is smaller than the sum of its proper divisors (97038063150994).

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

77021709463790 is a wasteful number, since it uses less digits than its factorization.

77021709463790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26458522 (or 26458515 counting only the distinct ones).

The product of its (nonzero) digits is 28005264, while the sum is 62.

The spelling of 77021709463790 in words is "seventy-seven trillion, twenty-one billion, seven hundred nine million, four hundred sixty-three thousand, seven hundred ninety".