61165051200 has 252 divisors, whose sum is σ = 237158832768. Its totient is φ = 14827852800.

The previous prime is 61165051169. The next prime is 61165051223. The reversal of 61165051200 is 215056116.

It is a happy number.

61165051200 is a `hidden beast` number, since 6 + 1 + 1 + 650 + 5 + 1 + 2 + 0 + 0 = 666.

61165051200 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 34672 + ... + 351471.

Almost surely, 2^61165051200 is an apocalyptic number.

61165051200 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 61165051200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118579416384).

61165051200 is an abundant number, since it is smaller than the sum of its proper divisors (175993781568).

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

61165051200 is a wasteful number, since it uses less digits than its factorization.

61165051200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386182 (or 386164 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The spelling of 61165051200 in words is "sixty-one billion, one hundred sixty-five million, fifty-one thousand, two hundred".