189758724157 has 4 divisors (see below), whose sum is σ = 189844164796. Its totient is φ = 189673283520.

The previous prime is 189758724151. The next prime is 189758724167. The reversal of 189758724157 is 751427857981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 751427857981 = 7703 ⋅97550027.

It can be written as a sum of positive squares in 2 ways, for example, as 126459183321 + 63299540836 = 355611^2 + 251594^2 .

It is a cyclic number.

It is not a de Polignac number, because 189758724157 - 2²³ = 189750335549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189758724151) 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, 42716988 + ... + 42721429.

It is an arithmetic number, because the mean of its divisors is an integer number (47461041199).

Almost surely, 2^189758724157 is an apocalyptic number.

It is an amenable number.

189758724157 is a deficient number, since it is larger than the sum of its proper divisors (85440639).

189758724157 is an equidigital number, since it uses as much as digits as its factorization.

189758724157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85440638.

The product of its digits is 39513600, while the sum is 64.

The spelling of 189758724157 in words is "one hundred eighty-nine billion, seven hundred fifty-eight million, seven hundred twenty-four thousand, one hundred fifty-seven".