77546785325 has 6 divisors (see below), whose sum is σ = 96158013834. Its totient is φ = 62037428240.

The previous prime is 77546785321. The next prime is 77546785357. The reversal of 77546785325 is 52358764577.

It can be written as a sum of positive squares in 3 ways, for example, as 25218392809 + 52328392516 = 158803^2 + 228754^2 .

It is not a de Polignac number, because 77546785325 - 2² = 77546785321 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77546785321) 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, 1550935682 + ... + 1550935731.

It is an arithmetic number, because the mean of its divisors is an integer number (16026335639).

Almost surely, 2^77546785325 is an apocalyptic number.

It is an amenable number.

77546785325 is a deficient number, since it is larger than the sum of its proper divisors (18611228509).

77546785325 is a wasteful number, since it uses less digits than its factorization.

77546785325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3101871423 (or 3101871418 counting only the distinct ones).

The product of its digits is 49392000, while the sum is 59.

The spelling of 77546785325 in words is "seventy-seven billion, five hundred forty-six million, seven hundred eighty-five thousand, three hundred twenty-five".