61851758885 has 16 divisors (see below), whose sum is σ = 86894180352. Its totient is φ = 41378179200.

The previous prime is 61851758879. The next prime is 61851758909. The reversal of 61851758885 is 58885715816.

It is not a de Polignac number, because 61851758885 - 2²⁴ = 61834981669 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21549701 + ... + 21552570.

It is an arithmetic number, because the mean of its divisors is an integer number (5430886272).

Almost surely, 2^61851758885 is an apocalyptic number.

It is an amenable number.

61851758885 is a deficient number, since it is larger than the sum of its proper divisors (25042421467).

61851758885 is a wasteful number, since it uses less digits than its factorization.

61851758885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43102324.

The product of its digits is 21504000, while the sum is 62.

The spelling of 61851758885 in words is "sixty-one billion, eight hundred fifty-one million, seven hundred fifty-eight thousand, eight hundred eighty-five".