77513325 has 24 divisors (see below), whose sum is σ = 128408448. Its totient is φ = 41258880.

The previous prime is 77513323. The next prime is 77513333. The reversal of 77513325 is 52331577.

It is not a de Polignac number, because 77513325 - 2¹ = 77513323 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77513321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69724 + ... + 70826.

It is an arithmetic number, because the mean of its divisors is an integer number (5350352).

Almost surely, 2^77513325 is an apocalyptic number.

77513325 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

77513325 is a deficient number, since it is larger than the sum of its proper divisors (50895123).

77513325 is a wasteful number, since it uses less digits than its factorization.

77513325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2053 (or 2048 counting only the distinct ones).

The product of its digits is 22050, while the sum is 33.

The square root of 77513325 is about 8804.1652074458. The cubic root of 77513325 is about 426.3753827160.

The spelling of 77513325 in words is "seventy-seven million, five hundred thirteen thousand, three hundred twenty-five".