61425809975 has 6 divisors (see below), whose sum is σ = 76168004400. Its totient is φ = 49140647960.

The previous prime is 61425809959. The next prime is 61425809983. The reversal of 61425809975 is 57990852416.

It is not a de Polignac number, because 61425809975 - 2⁴ = 61425809959 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61425809975.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1228516175 + ... + 1228516224.

It is an arithmetic number, because the mean of its divisors is an integer number (12694667400).

Almost surely, 2^61425809975 is an apocalyptic number.

61425809975 is a deficient number, since it is larger than the sum of its proper divisors (14742194425).

61425809975 is a wasteful number, since it uses less digits than its factorization.

61425809975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2457032409 (or 2457032404 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 56.

The spelling of 61425809975 in words is "sixty-one billion, four hundred twenty-five million, eight hundred nine thousand, nine hundred seventy-five".