61133486400 has 840 divisors, whose sum is σ = 260368613120. Its totient is φ = 13780316160.

The previous prime is 61133486333. The next prime is 61133486413. The reversal of 61133486400 is 468433116.

It is a happy number.

61133486400 is a `hidden beast` number, since 6 + 1 + 1 + 3 + 3 + 4 + 8 + 640 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (840).

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 119 ways as a sum of consecutive naturals, for example, 71668374 + ... + 71669226.

Almost surely, 2^61133486400 is an apocalyptic number.

61133486400 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 61133486400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130184306560).

61133486400 is an abundant number, since it is smaller than the sum of its proper divisors (199235126720).

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

61133486400 is a wasteful number, since it uses less digits than its factorization.

61133486400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973 (or 949 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The spelling of 61133486400 in words is "sixty-one billion, one hundred thirty-three million, four hundred eighty-six thousand, four hundred".