61214187800 has 24 divisors (see below), whose sum is σ = 142322987100. Its totient is φ = 24485675040.

The previous prime is 61214187799. The next prime is 61214187829. The reversal of 61214187800 is 878141216.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 153035270 + ... + 153035669.

Almost surely, 2^61214187800 is an apocalyptic number.

It is an amenable number.

61214187800 is an abundant number, since it is smaller than the sum of its proper divisors (81108799300).

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

61214187800 is a wasteful number, since it uses less digits than its factorization.

61214187800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306070955 (or 306070946 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 38.

The spelling of 61214187800 in words is "sixty-one billion, two hundred fourteen million, one hundred eighty-seven thousand, eight hundred".