77005033780 has 12 divisors (see below), whose sum is σ = 161710570980. Its totient is φ = 30802013504.

The previous prime is 77005033751. The next prime is 77005033789. The reversal of 77005033780 is 8733050077.

It can be written as a sum of positive squares in 2 ways, for example, as 17299088676 + 59705945104 = 131526^2 + 244348^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77005033789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1925125825 + ... + 1925125864.

It is an arithmetic number, because the mean of its divisors is an integer number (13475880915).

Almost surely, 2^77005033780 is an apocalyptic number.

It is an amenable number.

77005033780 is an abundant number, since it is smaller than the sum of its proper divisors (84705537200).

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

77005033780 is a wasteful number, since it uses less digits than its factorization.

77005033780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3850251698 (or 3850251696 counting only the distinct ones).

The product of its (nonzero) digits is 123480, while the sum is 40.

The spelling of 77005033780 in words is "seventy-seven billion, five million, thirty-three thousand, seven hundred eighty".