1855897926064 has 80 divisors (see below), whose sum is σ = 4425956720640. Its totient is φ = 734142654720.

The previous prime is 1855897926049. The next prime is 1855897926089. The reversal of 1855897926064 is 4606297985581.

It is a super-2 number, since 2×1855897926064² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1855897925984 and 1855897926002.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21200817 + ... + 21288175.

It is an arithmetic number, because the mean of its divisors is an integer number (55324459008).

Almost surely, 2^{1855897926064} is an apocalyptic number.

1855897926064 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1855897926064 is an abundant number, since it is smaller than the sum of its proper divisors (2570058794576).

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

1855897926064 is a wasteful number, since it uses less digits than its factorization.

1855897926064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101978 (or 101972 counting only the distinct ones).

The product of its (nonzero) digits is 261273600, while the sum is 70.

The spelling of 1855897926064 in words is "one trillion, eight hundred fifty-five billion, eight hundred ninety-seven million, nine hundred twenty-six thousand, sixty-four".