185372409253 has 4 divisors (see below), whose sum is σ = 185382769888. Its totient is φ = 185362048620.

The previous prime is 185372409203. The next prime is 185372409263. The reversal of 185372409253 is 352904273581.

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, and also an emirpimes, since its reverse is a distinct semiprime: 352904273581 = 167 ⋅2113199243.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-185372409253 is a prime.

It is a super-2 number, since 2×185372409253² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 185372409197 and 185372409206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (185372409203) 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, 5153433 + ... + 5189278.

It is an arithmetic number, because the mean of its divisors is an integer number (46345692472).

Almost surely, 2^185372409253 is an apocalyptic number.

It is an amenable number.

185372409253 is a deficient number, since it is larger than the sum of its proper divisors (10360635).

185372409253 is a wasteful number, since it uses less digits than its factorization.

185372409253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10360634.

The product of its (nonzero) digits is 1814400, while the sum is 49.

The spelling of 185372409253 in words is "one hundred eighty-five billion, three hundred seventy-two million, four hundred nine thousand, two hundred fifty-three".