1856938858780 has 24 divisors (see below), whose sum is σ = 3902132121552. Its totient is φ = 742287825792.

The previous prime is 1856938858769. The next prime is 1856938858781. The reversal of 1856938858780 is 878588396581.

It is a junction number, because it is equal to n+sod(n) for n = 1856938858697 and 1856938858706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1856938858781) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 30451137 + ... + 30512056.

It is an arithmetic number, because the mean of its divisors is an integer number (162588838398).

Almost surely, 2^{1856938858780} is an apocalyptic number.

1856938858780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1856938858780 is an abundant number, since it is smaller than the sum of its proper divisors (2045193262772).

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

1856938858780 is a wasteful number, since it uses less digits than its factorization.

1856938858780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60964725 (or 60964723 counting only the distinct ones).

The product of its (nonzero) digits is 928972800, while the sum is 76.

The spelling of 1856938858780 in words is "one trillion, eight hundred fifty-six billion, nine hundred thirty-eight million, eight hundred fifty-eight thousand, seven hundred eighty".