61984017312 has 48 divisors (see below), whose sum is σ = 185952053952. Its totient is φ = 17709719040.

The previous prime is 61984017257. The next prime is 61984017343. The reversal of 61984017312 is 21371048916.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 46118389 + ... + 46119732.

It is an arithmetic number, because the mean of its divisors is an integer number (3874001124).

Almost surely, 2^61984017312 is an apocalyptic number.

It is an amenable number.

61984017312 is an abundant number, since it is smaller than the sum of its proper divisors (123968036640).

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

61984017312 is a wasteful number, since it uses less digits than its factorization.

61984017312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92238141 (or 92238133 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The spelling of 61984017312 in words is "sixty-one billion, nine hundred eighty-four million, seventeen thousand, three hundred twelve".