61425178163 has 8 divisors (see below), whose sum is σ = 61793472000. Its totient is φ = 61057480968.

The previous prime is 61425178093. The next prime is 61425178169. The reversal of 61425178163 is 36187152416.

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

It is a cyclic number.

It is not a de Polignac number, because 61425178163 - 2¹² = 61425174067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61425178169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58220 + ... + 355302.

It is an arithmetic number, because the mean of its divisors is an integer number (7724184000).

Almost surely, 2^61425178163 is an apocalyptic number.

61425178163 is a deficient number, since it is larger than the sum of its proper divisors (368293837).

61425178163 is a wasteful number, since it uses less digits than its factorization.

61425178163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298321.

The product of its digits is 241920, while the sum is 44.

The spelling of 61425178163 in words is "sixty-one billion, four hundred twenty-five million, one hundred seventy-eight thousand, one hundred sixty-three".