61375881020 has 24 divisors (see below), whose sum is σ = 130140707424. Its totient is φ = 24311998656.

The previous prime is 61375880953. The next prime is 61375881029. The reversal of 61375881020 is 2018857316.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61375881029) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 14894999 + ... + 14899118.

It is an arithmetic number, because the mean of its divisors is an integer number (5422529476).

Almost surely, 2^61375881020 is an apocalyptic number.

It is an amenable number.

61375881020 is an abundant number, since it is smaller than the sum of its proper divisors (68764826404).

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

61375881020 is a wasteful number, since it uses less digits than its factorization.

61375881020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29794229 (or 29794227 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 41.

The spelling of 61375881020 in words is "sixty-one billion, three hundred seventy-five million, eight hundred eighty-one thousand, twenty".