61105644 has 24 divisors (see below), whose sum is σ = 158422320. Its totient is φ = 20368512.

The previous prime is 61105613. The next prime is 61105663. The reversal of 61105644 is 44650116.

61105644 is a `hidden beast` number, since 6 + 1 + 10 + 5 + 644 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 282789 + ... + 283004.

It is an arithmetic number, because the mean of its divisors is an integer number (6600930).

Almost surely, 2^61105644 is an apocalyptic number.

It is an amenable number.

61105644 is an abundant number, since it is smaller than the sum of its proper divisors (97316676).

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

61105644 is a wasteful number, since it uses less digits than its factorization.

61105644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565806 (or 565798 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 61105644 is about 7817.0099142831. The cubic root of 61105644 is about 393.8768371426.

The spelling of 61105644 in words is "sixty-one million, one hundred five thousand, six hundred forty-four".