61461363912 has 64 divisors (see below), whose sum is σ = 165699266880. Its totient is φ = 18885318912.

The previous prime is 61461363911. The next prime is 61461363941. The reversal of 61461363912 is 21936316416.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (61461363911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94323 + ... + 363069.

It is an arithmetic number, because the mean of its divisors is an integer number (2589051045).

Almost surely, 2^61461363912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61461363912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82849633440).

61461363912 is an abundant number, since it is smaller than the sum of its proper divisors (104237902968).

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

61461363912 is a wasteful number, since it uses less digits than its factorization.

61461363912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269502 (or 269498 counting only the distinct ones).

The product of its digits is 139968, while the sum is 42.

The spelling of 61461363912 in words is "sixty-one billion, four hundred sixty-one million, three hundred sixty-three thousand, nine hundred twelve".