77872208393472 has 36 divisors (see below), whose sum is σ = 207253637965920. Its totient is φ = 25957402797568.

The previous prime is 77872208393449. The next prime is 77872208393519. The reversal of 77872208393472 is 27439380227877.

It is a junction number, because it is equal to n+sod(n) for n = 77872208393397 and 77872208393406.

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, 50698051572 + ... + 50698053107.

Almost surely, 2^{77872208393472} is an apocalyptic number.

It is an amenable number.

77872208393472 is an abundant number, since it is smaller than the sum of its proper divisors (129381429572448).

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

77872208393472 is a wasteful number, since it uses less digits than its factorization.

77872208393472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101396104698 (or 101396104684 counting only the distinct ones).

The product of its (nonzero) digits is 398297088, while the sum is 69.

The spelling of 77872208393472 in words is "seventy-seven trillion, eight hundred seventy-two billion, two hundred eight million, three hundred ninety-three thousand, four hundred seventy-two".