61610425 has 18 divisors (see below), whose sum is σ = 77478362. Its totient is φ = 48599040.

The previous prime is 61610401. The next prime is 61610429. The reversal of 61610425 is 52401616.

It can be written as a sum of positive squares in 9 ways, for example, as 57881664 + 3728761 = 7608^2 + 1931^2 .

It is a de Polignac number, because none of the positive numbers 2^k-61610425 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61610425.

It is not an unprimeable number, because it can be changed into a prime (61610429) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 319129 + ... + 319321.

Almost surely, 2^61610425 is an apocalyptic number.

It is an amenable number.

61610425 is a deficient number, since it is larger than the sum of its proper divisors (15867937).

61610425 is a wasteful number, since it uses less digits than its factorization.

61610425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429 (or 311 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 61610425 is about 7849.2308540391. The cubic root of 61610425 is about 394.9584424580.

The spelling of 61610425 in words is "sixty-one million, six hundred ten thousand, four hundred twenty-five".