61511725 has 12 divisors (see below), whose sum is σ = 83208960. Its totient is φ = 44735600.

The previous prime is 61511713. The next prime is 61511753. The reversal of 61511725 is 52711516.

61511725 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61511725 - 2⁵ = 61511693 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61511693 and 61511702.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111565 + ... + 112114.

It is an arithmetic number, because the mean of its divisors is an integer number (6934080).

Almost surely, 2^61511725 is an apocalyptic number.

It is an amenable number.

61511725 is a deficient number, since it is larger than the sum of its proper divisors (21697235).

61511725 is a wasteful number, since it uses less digits than its factorization.

61511725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223700 (or 223695 counting only the distinct ones).

The product of its digits is 2100, while the sum is 28.

The square root of 61511725 is about 7842.9410937479. The cubic root of 61511725 is about 394.7474217125.

The spelling of 61511725 in words is "sixty-one million, five hundred eleven thousand, seven hundred twenty-five".