77494725 has 180 divisors, whose sum is σ = 184729248. Its totient is φ = 31752000.

The previous prime is 77494723. The next prime is 77494727. The reversal of 77494725 is 52749477.

It is an interprime number because it is at equal distance from previous prime (77494723) and next prime (77494727).

It is not a de Polignac number, because 77494725 - 2¹ = 77494723 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77494723) by changing a digit.

It is a polite number, since it can be written in 179 ways as a sum of consecutive naturals, for example, 1091440 + ... + 1091510.

Almost surely, 2^77494725 is an apocalyptic number.

77494725 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

77494725 is an abundant number, since it is smaller than the sum of its proper divisors (107234523).

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

77494725 is a wasteful number, since it uses less digits than its factorization.

77494725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118 (or 97 counting only the distinct ones).

The product of its digits is 493920, while the sum is 45.

The square root of 77494725 is about 8803.1088258637. The cubic root of 77494725 is about 426.3412758209.

It can be divided in two parts, 7749472 and 5, that added together give a palindrome (7749477).

The spelling of 77494725 in words is "seventy-seven million, four hundred ninety-four thousand, seven hundred twenty-five".