61539961332 has 48 divisors (see below), whose sum is σ = 144560393600. Its totient is φ = 20375252352.

The previous prime is 61539961331. The next prime is 61539961361. The reversal of 61539961332 is 23316993516.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61539961331) 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, 8148294 + ... + 8155842.

Almost surely, 2^61539961332 is an apocalyptic number.

It is an amenable number.

61539961332 is an abundant number, since it is smaller than the sum of its proper divisors (83020432268).

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

61539961332 is a wasteful number, since it uses less digits than its factorization.

61539961332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12040 (or 12038 counting only the distinct ones).

The product of its digits is 787320, while the sum is 48.

The spelling of 61539961332 in words is "sixty-one billion, five hundred thirty-nine million, nine hundred sixty-one thousand, three hundred thirty-two".