61744471752 has 16 divisors (see below), whose sum is σ = 154361179440. Its totient is φ = 20581490576.

The previous prime is 61744471751. The next prime is 61744471771. The reversal of 61744471752 is 25717444716.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (61744471751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1286343138 + ... + 1286343185.

It is an arithmetic number, because the mean of its divisors is an integer number (9647573715).

Almost surely, 2^61744471752 is an apocalyptic number.

It is an amenable number.

61744471752 is an abundant number, since it is smaller than the sum of its proper divisors (92616707688).

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

61744471752 is a wasteful number, since it uses less digits than its factorization.

61744471752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2572686332 (or 2572686328 counting only the distinct ones).

The product of its digits is 1317120, while the sum is 48.

The spelling of 61744471752 in words is "sixty-one billion, seven hundred forty-four million, four hundred seventy-one thousand, seven hundred fifty-two".