77738242240528 has 30 divisors (see below), whose sum is σ = 158962323263694. Its totient is φ = 36823377900672.

The previous prime is 77738242240523. The next prime is 77738242240541. The reversal of 77738242240528 is 82504224283777.

It can be written as a sum of positive squares in only one way, i.e., 61692353384704 + 16045888855824 = 7854448^2 + 4005732^2 .

It is not an unprimeable number, because it can be changed into a prime (77738242240523) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6729412701 + ... + 6729424252.

Almost surely, 2^{77738242240528} is an apocalyptic number.

It is an amenable number.

77738242240528 is an abundant number, since it is smaller than the sum of its proper divisors (81224081023166).

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

77738242240528 is a wasteful number, since it uses less digits than its factorization.

77738242240528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13458836999 (or 13458836974 counting only the distinct ones).

The product of its (nonzero) digits is 84295680, while the sum is 61.

The spelling of 77738242240528 in words is "seventy-seven trillion, seven hundred thirty-eight billion, two hundred forty-two million, two hundred forty thousand, five hundred twenty-eight".