77532174916 has 27 divisors (see below), whose sum is σ = 157841292189. Its totient is φ = 33226404288.

The previous prime is 77532174901. The next prime is 77532174943. The reversal of 77532174916 is 61947123577.

It is a happy number.

The square root of 77532174916 is 278446.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 73091285316 + 4440889600 = 270354^2 + 66640^2 .

It is a super-2 number, since 2×77532174916² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3888300 + ... + 3908188.

Almost surely, 2^77532174916 is an apocalyptic number.

77532174916 is the 278446-th square number.

It is an amenable number.

77532174916 is an abundant number, since it is smaller than the sum of its proper divisors (80309117273).

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

77532174916 is an frugal number, since it uses more digits than its factorization.

77532174916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39796 (or 19898 counting only the distinct ones).

The product of its digits is 2222640, while the sum is 52.

The spelling of 77532174916 in words is "seventy-seven billion, five hundred thirty-two million, one hundred seventy-four thousand, nine hundred sixteen".