61165540 has 24 divisors (see below), whose sum is σ = 128705472. Its totient is φ = 24417120.

The previous prime is 61165469. The next prime is 61165547. The reversal of 61165540 is 4556116.

It is a junction number, because it is equal to n+sod(n) for n = 61165499 and 61165508.

It is not an unprimeable number, because it can be changed into a prime (61165547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8145 + ... + 13735.

It is an arithmetic number, because the mean of its divisors is an integer number (5362728).

Almost surely, 2^61165540 is an apocalyptic number.

It is an amenable number.

61165540 is an abundant number, since it is smaller than the sum of its proper divisors (67539932).

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

61165540 is a wasteful number, since it uses less digits than its factorization.

61165540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6147 (or 6145 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 61165540 is about 7820.8401083260. The cubic root of 61165540 is about 394.0054883412.

The spelling of 61165540 in words is "sixty-one million, one hundred sixty-five thousand, five hundred forty".