61851677776 has 40 divisors (see below), whose sum is σ = 137777431680. Its totient is φ = 26349124224.

The previous prime is 61851677753. The next prime is 61851677807. The reversal of 61851677776 is 67777615816.

It is a super-2 number, since 2×61851677776² (a number of 22 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 1634731 + ... + 1672138.

It is an arithmetic number, because the mean of its divisors is an integer number (3444435792).

Almost surely, 2^61851677776 is an apocalyptic number.

It is an amenable number.

61851677776 is an abundant number, since it is smaller than the sum of its proper divisors (75925753904).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61851677776 is a wasteful number, since it uses less digits than its factorization.

61851677776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3307051 (or 3307045 counting only the distinct ones).

The product of its digits is 20744640, while the sum is 61.

The spelling of 61851677776 in words is "sixty-one billion, eight hundred fifty-one million, six hundred seventy-seven thousand, seven hundred seventy-six".