61753540 has 24 divisors (see below), whose sum is σ = 131143320. Its totient is φ = 24423168.

The previous prime is 61753511. The next prime is 61753567. The reversal of 61753540 is 4535716.

It can be written as a sum of positive squares in 4 ways, for example, as 3261636 + 58491904 = 1806^2 + 7648^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15567 + ... + 19126.

It is an arithmetic number, because the mean of its divisors is an integer number (5464305).

Almost surely, 2^61753540 is an apocalyptic number.

It is an amenable number.

61753540 is an abundant number, since it is smaller than the sum of its proper divisors (69389780).

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

61753540 is a wasteful number, since it uses less digits than its factorization.

61753540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34791 (or 34789 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 61753540 is about 7858.3420643288. The cubic root of 61753540 is about 395.2640225983.

The spelling of 61753540 in words is "sixty-one million, seven hundred fifty-three thousand, five hundred forty".