77242991959 has 48 divisors (see below), whose sum is σ = 92228830848. Its totient is φ = 64485989568.

The previous prime is 77242991957. The next prime is 77242992031. The reversal of 77242991959 is 95919924277.

It is not a de Polignac number, because 77242991959 - 2¹ = 77242991957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77242991959.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77242991957) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 174363192 + ... + 174363634.

It is an arithmetic number, because the mean of its divisors is an integer number (1921433976).

Almost surely, 2^77242991959 is an apocalyptic number.

77242991959 is a deficient number, since it is larger than the sum of its proper divisors (14985838889).

77242991959 is a wasteful number, since it uses less digits than its factorization.

77242991959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1004 (or 997 counting only the distinct ones).

The product of its digits is 25719120, while the sum is 64.

The spelling of 77242991959 in words is "seventy-seven billion, two hundred forty-two million, nine hundred ninety-one thousand, nine hundred fifty-nine".