61618856902 has 8 divisors (see below), whose sum is σ = 92431301256. Its totient is φ = 30808423152.

The previous prime is 61618856899. The next prime is 61618856933. The reversal of 61618856902 is 20965881616.

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

It is a self number, because there is not a number n which added to its sum of digits gives 61618856902.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 423543 + ... + 550114.

It is an arithmetic number, because the mean of its divisors is an integer number (11553912657).

Almost surely, 2^61618856902 is an apocalyptic number.

61618856902 is a deficient number, since it is larger than the sum of its proper divisors (30812444354).

61618856902 is a wasteful number, since it uses less digits than its factorization.

61618856902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005302.

The product of its (nonzero) digits is 1244160, while the sum is 52.

The spelling of 61618856902 in words is "sixty-one billion, six hundred eighteen million, eight hundred fifty-six thousand, nine hundred two".