61481919122 has 18 divisors (see below), whose sum is σ = 99870048693. Its totient is φ = 28374166392.

The previous prime is 61481919119. The next prime is 61481919131. The reversal of 61481919122 is 22191918416.

It can be written as a sum of positive squares in 2 ways, for example, as 52568859841 + 8913059281 = 229279^2 + 94409^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=175331.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4551863 + ... + 4565349.

Almost surely, 2^61481919122 is an apocalyptic number.

61481919122 is a deficient number, since it is larger than the sum of its proper divisors (38388129571).

61481919122 is an frugal number, since it uses more digits than its factorization.

61481919122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27002 (or 13502 counting only the distinct ones).

The product of its digits is 62208, while the sum is 44.

The spelling of 61481919122 in words is "sixty-one billion, four hundred eighty-one million, nine hundred nineteen thousand, one hundred twenty-two".