77525075680 has 96 divisors (see below), whose sum is σ = 200475481248. Its totient is φ = 28155340800.

The previous prime is 77525075671. The next prime is 77525075689. The reversal of 77525075680 is 8657052577.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (77525075671) and next prime (77525075689).

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77525075689) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178626 + ... + 432385.

It is an arithmetic number, because the mean of its divisors is an integer number (2088286263).

Almost surely, 2^77525075680 is an apocalyptic number.

It is an amenable number.

77525075680 is an abundant number, since it is smaller than the sum of its proper divisors (122950405568).

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

77525075680 is a wasteful number, since it uses less digits than its factorization.

77525075680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611100 (or 611092 counting only the distinct ones).

The product of its (nonzero) digits is 4116000, while the sum is 52.

The spelling of 77525075680 in words is "seventy-seven billion, five hundred twenty-five million, seventy-five thousand, six hundred eighty".