61653144 has 32 divisors (see below), whose sum is σ = 176152320. Its totient is φ = 17615136.

The previous prime is 61653131. The next prime is 61653167. The reversal of 61653144 is 44135616.

It is a super-2 number, since 2×61653144² = 7602220330169472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183324 + ... + 183659.

It is an arithmetic number, because the mean of its divisors is an integer number (5504760).

Almost surely, 2^61653144 is an apocalyptic number.

It is an amenable number.

61653144 is an abundant number, since it is smaller than the sum of its proper divisors (114499176).

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

61653144 is a wasteful number, since it uses less digits than its factorization.

61653144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366999 (or 366995 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

The square root of 61653144 is about 7851.9516045376. The cubic root of 61653144 is about 395.0497058637.

The spelling of 61653144 in words is "sixty-one million, six hundred fifty-three thousand, one hundred forty-four".