61481426616 has 48 divisors (see below), whose sum is σ = 166530015600. Its totient is φ = 20491615872.

The previous prime is 61481426599. The next prime is 61481426627. The reversal of 61481426616 is 61662418416.

61481426616 is a `hidden beast` number, since 6 + 1 + 4 + 8 + 1 + 4 + 26 + 616 = 666.

It is a super-2 number, since 2×61481426616² (a number of 22 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 720420 + ... + 801228.

It is an arithmetic number, because the mean of its divisors is an integer number (3469375325).

Almost surely, 2^61481426616 is an apocalyptic number.

It is an amenable number.

61481426616 is an abundant number, since it is smaller than the sum of its proper divisors (105048588984).

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

61481426616 is a wasteful number, since it uses less digits than its factorization.

61481426616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91388 (or 91381 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The spelling of 61481426616 in words is "sixty-one billion, four hundred eighty-one million, four hundred twenty-six thousand, six hundred sixteen".