61561748 has 12 divisors (see below), whose sum is σ = 113403360. Its totient is φ = 29160792.

The previous prime is 61561733. The next prime is 61561771. The reversal of 61561748 is 84716516.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 404936 + ... + 405087.

It is an arithmetic number, because the mean of its divisors is an integer number (9450280).

Almost surely, 2^61561748 is an apocalyptic number.

It is an amenable number.

61561748 is a deficient number, since it is larger than the sum of its proper divisors (51841612).

61561748 is a wasteful number, since it uses less digits than its factorization.

61561748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810046 (or 810044 counting only the distinct ones).

The product of its digits is 40320, while the sum is 38.

The square root of 61561748 is about 7846.1294916666. The cubic root of 61561748 is about 394.8543991488.

The spelling of 61561748 in words is "sixty-one million, five hundred sixty-one thousand, seven hundred forty-eight".