1858664495941 has 4 divisors (see below), whose sum is σ = 2027633995584. Its totient is φ = 1689694996300.

The previous prime is 1858664495927. The next prime is 1858664496023. The reversal of 1858664495941 is 1495944668581.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1858664495941 is a prime.

It is a super-2 number, since 2×1858664495941² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1858664495921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84484749805 + ... + 84484749826.

It is an arithmetic number, because the mean of its divisors is an integer number (506908498896).

Almost surely, 2^{1858664495941} is an apocalyptic number.

1858664495941 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1858664495941 is a deficient number, since it is larger than the sum of its proper divisors (168969499643).

1858664495941 is a wasteful number, since it uses less digits than its factorization.

1858664495941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168969499642.

The product of its digits is 298598400, while the sum is 70.

The spelling of 1858664495941 in words is "one trillion, eight hundred fifty-eight billion, six hundred sixty-four million, four hundred ninety-five thousand, nine hundred forty-one".