61427428617 has 8 divisors (see below), whose sum is σ = 81984414880. Its totient is φ = 40911030720.

The previous prime is 61427428609. The next prime is 61427428627. The reversal of 61427428617 is 71682472416.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61427428617 - 2³ = 61427428609 is a prime.

It is a super-3 number, since 3×61427428617³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61427428627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10143559 + ... + 10149612.

It is an arithmetic number, because the mean of its divisors is an integer number (10248051860).

Almost surely, 2^61427428617 is an apocalyptic number.

It is an amenable number.

61427428617 is a deficient number, since it is larger than the sum of its proper divisors (20556986263).

61427428617 is a wasteful number, since it uses less digits than its factorization.

61427428617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20294183.

The product of its digits is 903168, while the sum is 48.

The spelling of 61427428617 in words is "sixty-one billion, four hundred twenty-seven million, four hundred twenty-eight thousand, six hundred seventeen".