61995600 has 180 divisors, whose sum is σ = 228022236. Its totient is φ = 15544320.

The previous prime is 61995599. The next prime is 61995611. The reversal of 61995600 is 659916.

61995600 is a `hidden beast` number, since 6 + 1 + 99 + 560 + 0 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 7884864 + 54110736 = 2808^2 + 7356^2 .

It is a tau number, because it is divible by the number of its divisors (180).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 60694 + ... + 61706.

Almost surely, 2^61995600 is an apocalyptic number.

61995600 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61995600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114011118).

61995600 is an abundant number, since it is smaller than the sum of its proper divisors (166026636).

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

61995600 is a wasteful number, since it uses less digits than its factorization.

61995600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054 (or 1040 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 61995600 is about 7873.7284687751. The cubic root of 61995600 is about 395.7797979922.

The spelling of 61995600 in words is "sixty-one million, nine hundred ninety-five thousand, six hundred".