61432249944 has 128 divisors (see below), whose sum is σ = 166870932480. Its totient is φ = 18734284800.

The previous prime is 61432249927. The next prime is 61432249961. The reversal of 61432249944 is 44994223416.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (61432249927) and next prime (61432249961).

It is a junction number, because it is equal to n+sod(n) for n = 61432249893 and 61432249902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16917009 + ... + 16920639.

It is an arithmetic number, because the mean of its divisors is an integer number (1303679160).

Almost surely, 2^61432249944 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 61432249944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83435466240).

61432249944 is an abundant number, since it is smaller than the sum of its proper divisors (105438682536).

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

61432249944 is a wasteful number, since it uses less digits than its factorization.

61432249944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4121 (or 4117 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 48.

The spelling of 61432249944 in words is "sixty-one billion, four hundred thirty-two million, two hundred forty-nine thousand, nine hundred forty-four".