185107211493 has 4 divisors (see below), whose sum is σ = 246809615328. Its totient is φ = 123404807660.

The previous prime is 185107211489. The next prime is 185107211543. The reversal of 185107211493 is 394112701581.

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 not a de Polignac number, because 185107211493 - 2² = 185107211489 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (185107210493) 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, 30851201913 + ... + 30851201918.

It is an arithmetic number, because the mean of its divisors is an integer number (61702403832).

Almost surely, 2^185107211493 is an apocalyptic number.

It is an amenable number.

185107211493 is a deficient number, since it is larger than the sum of its proper divisors (61702403835).

185107211493 is an equidigital number, since it uses as much as digits as its factorization.

185107211493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61702403834.

The product of its (nonzero) digits is 60480, while the sum is 42.

The spelling of 185107211493 in words is "one hundred eighty-five billion, one hundred seven million, two hundred eleven thousand, four hundred ninety-three".