61605875601818 has 32 divisors (see below), whose sum is σ = 96420960931968. Its totient is φ = 29493687988800.

The previous prime is 61605875601719. The next prime is 61605875601833. The reversal of 61605875601818 is 81810657850616.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7994480 + ... + 13679307.

It is an arithmetic number, because the mean of its divisors is an integer number (3013155029124).

Almost surely, 2^{61605875601818} is an apocalyptic number.

61605875601818 is a deficient number, since it is larger than the sum of its proper divisors (34815085330150).

61605875601818 is a wasteful number, since it uses less digits than its factorization.

61605875601818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21674438.

The product of its (nonzero) digits is 19353600, while the sum is 62.

The spelling of 61605875601818 in words is "sixty-one trillion, six hundred five billion, eight hundred seventy-five million, six hundred one thousand, eight hundred eighteen".