61744725 has 72 divisors (see below), whose sum is σ = 127670400. Its totient is φ = 27941760.

The previous prime is 61744717. The next prime is 61744747. The reversal of 61744725 is 52744716.

It is not a de Polignac number, because 61744725 - 2³ = 61744717 is a prime.

It is a super-2 number, since 2×61744725² = 7624822130651250, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61744725.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 310176 + ... + 310374.

It is an arithmetic number, because the mean of its divisors is an integer number (1773200).

Almost surely, 2^61744725 is an apocalyptic number.

It is an amenable number.

61744725 is an abundant number, since it is smaller than the sum of its proper divisors (65925675).

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

61744725 is a wasteful number, since it uses less digits than its factorization.

61744725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419 (or 411 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 61744725 is about 7857.7811753701. The cubic root of 61744725 is about 395.2452144017.

Subtracting from 61744725 its reverse (52744716), we obtain a palindrome (9000009).

The spelling of 61744725 in words is "sixty-one million, seven hundred forty-four thousand, seven hundred twenty-five".