77382891651 has 32 divisors (see below), whose sum is σ = 117704059200. Its totient is φ = 44798459904.

The previous prime is 77382891613. The next prime is 77382891653. The reversal of 77382891651 is 15619828377.

It is a happy number.

It is not a de Polignac number, because 77382891651 - 2¹⁴ = 77382875267 is a prime.

It is a super-2 number, since 2×77382891651² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 77382891591 and 77382891600.

It is not an unprimeable number, because it can be changed into a prime (77382891653) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1481325 + ... + 1532673.

It is an arithmetic number, because the mean of its divisors is an integer number (3678251850).

Almost surely, 2^77382891651 is an apocalyptic number.

77382891651 is a deficient number, since it is larger than the sum of its proper divisors (40321167549).

77382891651 is a wasteful number, since it uses less digits than its factorization.

77382891651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53655.

The product of its digits is 5080320, while the sum is 57.

The spelling of 77382891651 in words is "seventy-seven billion, three hundred eighty-two million, eight hundred ninety-one thousand, six hundred fifty-one".