61427428616 has 16 divisors (see below), whose sum is σ = 115425196800. Its totient is φ = 30647376144.

The previous prime is 61427428609. The next prime is 61427428627. The reversal of 61427428616 is 61682472416.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8288336 + ... + 8295743.

It is an arithmetic number, because the mean of its divisors is an integer number (7214074800).

Almost surely, 2^61427428616 is an apocalyptic number.

It is an amenable number.

61427428616 is a deficient number, since it is larger than the sum of its proper divisors (53997768184).

61427428616 is a wasteful number, since it uses less digits than its factorization.

61427428616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16584548 (or 16584544 counting only the distinct ones).

The product of its digits is 774144, while the sum is 47.

The spelling of 61427428616 in words is "sixty-one billion, four hundred twenty-seven million, four hundred twenty-eight thousand, six hundred sixteen".