61780612481292 has 12 divisors (see below), whose sum is σ = 144154762456376. Its totient is φ = 20593537493760.

The previous prime is 61780612481267. The next prime is 61780612481293. The reversal of 61780612481292 is 29218421608716.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (61780612481293) 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, 2574192186709 + ... + 2574192186732.

Almost surely, 2^{61780612481292} is an apocalyptic number.

It is an amenable number.

61780612481292 is an abundant number, since it is smaller than the sum of its proper divisors (82374149975084).

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

61780612481292 is a wasteful number, since it uses less digits than its factorization.

61780612481292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5148384373448 (or 5148384373446 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 57.

The spelling of 61780612481292 in words is "sixty-one trillion, seven hundred eighty billion, six hundred twelve million, four hundred eighty-one thousand, two hundred ninety-two".