1858665962241 has 135 divisors (see below), whose sum is σ = 3128877517843. Its totient is φ = 1098734107680.

The previous prime is 1858665962233. The next prime is 1858665962261. The reversal of 1858665962241 is 1422695668581.

The square root of 1858665962241 is 1363329.

It is a perfect power (a square), and thus also a powerful number.

1858665962241 is a `hidden beast` number, since 1 + 8 + 586 + 6 + 5 + 9 + 6 + 2 + 2 + 41 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1758554471025 + 100111491216 = 1326105^2 + 316404^2 .

It is not a de Polignac number, because 1858665962241 - 2³ = 1858665962233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1858665962201) 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 134 ways as a sum of consecutive naturals, for example, 6343569691 + ... + 6343569983.

Almost surely, 2^{1858665962241} is an apocalyptic number.

1858665962241 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1858665962241 is the 1363329-th square number.

1858665962241 is the 681665-th centered octagonal number.

It is an amenable number.

1858665962241 is a deficient number, since it is larger than the sum of its proper divisors (1270211555602).

1858665962241 is an frugal number, since it uses more digits than its factorization.

1858665962241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714 (or 354 counting only the distinct ones).

The product of its digits is 49766400, while the sum is 63.

The spelling of 1858665962241 in words is "one trillion, eight hundred fifty-eight billion, six hundred sixty-five million, nine hundred sixty-two thousand, two hundred forty-one".