61185399886 has 8 divisors (see below), whose sum is σ = 98837953704. Its totient is φ = 28239415320.

The previous prime is 61185399881. The next prime is 61185399967. The reversal of 61185399886 is 68899358116.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61185399881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1176642280 + ... + 1176642331.

It is an arithmetic number, because the mean of its divisors is an integer number (12354744213).

Almost surely, 2^61185399886 is an apocalyptic number.

61185399886 is a deficient number, since it is larger than the sum of its proper divisors (37652553818).

61185399886 is a wasteful number, since it uses less digits than its factorization.

61185399886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2353284626.

The product of its digits is 22394880, while the sum is 64.

The spelling of 61185399886 in words is "sixty-one billion, one hundred eighty-five million, three hundred ninety-nine thousand, eight hundred eighty-six".