61331553100 has 36 divisors (see below), whose sum is σ = 134407209888. Its totient is φ = 24289720000.

The previous prime is 61331553083. The next prime is 61331553113. The reversal of 61331553100 is 135513316.

It is a super-2 number, since 2×61331553100² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3026116 + ... + 3046315.

It is an arithmetic number, because the mean of its divisors is an integer number (3733533608).

Almost surely, 2^61331553100 is an apocalyptic number.

It is an amenable number.

61331553100 is an abundant number, since it is smaller than the sum of its proper divisors (73075656788).

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

61331553100 is a wasteful number, since it uses less digits than its factorization.

61331553100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6072546 (or 6072539 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 28.

The spelling of 61331553100 in words is "sixty-one billion, three hundred thirty-one million, five hundred fifty-three thousand, one hundred".