61461985960 has 32 divisors (see below), whose sum is σ = 138307581000. Its totient is φ = 24581574400.

The previous prime is 61461985927. The next prime is 61461985969. The reversal of 61461985960 is 6958916416.

It can be written as a sum of positive squares in 4 ways, for example, as 28778408164 + 32683577796 = 169642^2 + 180786^2 .

It is not an unprimeable number, because it can be changed into a prime (61461985969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221310 + ... + 414610.

Almost surely, 2^61461985960 is an apocalyptic number.

It is an amenable number.

61461985960 is an abundant number, since it is smaller than the sum of its proper divisors (76845595040).

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

61461985960 is a wasteful number, since it uses less digits than its factorization.

61461985960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201261 (or 201257 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 55.

The spelling of 61461985960 in words is "sixty-one billion, four hundred sixty-one million, nine hundred eighty-five thousand, nine hundred sixty".