61200622100 has 36 divisors (see below), whose sum is σ = 136044513948. Its totient is φ = 23883168000.

The previous prime is 61200622019. The next prime is 61200622123. The reversal of 61200622100 is 122600216.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 2366238736 + 58834383364 = 48644^2 + 242558^2 .

It is a super-2 number, since 2×61200622100² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7459391 + ... + 7467590.

Almost surely, 2^61200622100 is an apocalyptic number.

It is an amenable number.

61200622100 is an abundant number, since it is smaller than the sum of its proper divisors (74843891848).

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

61200622100 is a wasteful number, since it uses less digits than its factorization.

61200622100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14927036 (or 14927029 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The spelling of 61200622100 in words is "sixty-one billion, two hundred million, six hundred twenty-two thousand, one hundred".