61610725 has 24 divisors (see below), whose sum is σ = 83932128. Its totient is φ = 44491200.

The previous prime is 61610723. The next prime is 61610729. The reversal of 61610725 is 52701616.

It is not a de Polignac number, because 61610725 - 2¹ = 61610723 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61610693 and 61610702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61610723) 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, 42462 + ... + 43888.

It is an arithmetic number, because the mean of its divisors is an integer number (3497172).

Almost surely, 2^61610725 is an apocalyptic number.

61610725 is the 3925-th decagonal number.

It is an amenable number.

61610725 is a deficient number, since it is larger than the sum of its proper divisors (22321403).

61610725 is a wasteful number, since it uses less digits than its factorization.

61610725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1605 (or 1600 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 61610725 is about 7849.2499641686. The cubic root of 61610725 is about 394.9590835148.

The spelling of 61610725 in words is "sixty-one million, six hundred ten thousand, seven hundred twenty-five".