61395624 has 128 divisors (see below), whose sum is σ = 180403200. Its totient is φ = 19319040.

The previous prime is 61395623. The next prime is 61395629. The reversal of 61395624 is 42659316.

It is a happy number.

61395624 is a `hidden beast` number, since 61 + 39 + 562 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (61395623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 354802 + ... + 354974.

It is an arithmetic number, because the mean of its divisors is an integer number (1409400).

Almost surely, 2^61395624 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61395624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90201600).

61395624 is an abundant number, since it is smaller than the sum of its proper divisors (119007576).

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

61395624 is a wasteful number, since it uses less digits than its factorization.

61395624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272 (or 262 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 61395624 is about 7835.5359740097. The cubic root of 61395624 is about 394.4989084675.

The spelling of 61395624 in words is "sixty-one million, three hundred ninety-five thousand, six hundred twenty-four".