61457241140 has 24 divisors (see below), whose sum is σ = 129068003232. Its totient is φ = 24581411360.

The previous prime is 61457241121. The next prime is 61457241163. The reversal of 61457241140 is 4114275416.

It is a self number, because there is not a number n which added to its sum of digits gives 61457241140.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 283787 + ... + 451053.

It is an arithmetic number, because the mean of its divisors is an integer number (5377833468).

Almost surely, 2^61457241140 is an apocalyptic number.

It is an amenable number.

61457241140 is an abundant number, since it is smaller than the sum of its proper divisors (67610762092).

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

61457241140 is a wasteful number, since it uses less digits than its factorization.

61457241140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185647 (or 185645 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The spelling of 61457241140 in words is "sixty-one billion, four hundred fifty-seven million, two hundred forty-one thousand, one hundred forty".