77531116722 has 16 divisors (see below), whose sum is σ = 155320247712. Its totient is φ = 25800703200.

The previous prime is 77531116721. The next prime is 77531116771. The reversal of 77531116722 is 22761113577.

It is a super-2 number, since 2×77531116722² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77531116721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10746688 + ... + 10753899.

It is an arithmetic number, because the mean of its divisors is an integer number (9707515482).

Almost surely, 2^77531116722 is an apocalyptic number.

77531116722 is an abundant number, since it is smaller than the sum of its proper divisors (77789130990).

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

77531116722 is a wasteful number, since it uses less digits than its factorization.

77531116722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21501193.

The product of its digits is 123480, while the sum is 42.

The spelling of 77531116722 in words is "seventy-seven billion, five hundred thirty-one million, one hundred sixteen thousand, seven hundred twenty-two".