157322202449 has 4 divisors (see below), whose sum is σ = 161159329380. Its totient is φ = 153485075520.

The previous prime is 157322202431. The next prime is 157322202463. The reversal of 157322202449 is 944202223751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 944202223751 = 743447 ⋅1270033.

It can be written as a sum of positive squares in 2 ways, for example, as 36397008400 + 120925194049 = 190780^2 + 347743^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157322202449 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 3837126889 = 157322202449 / (1 + 5 + 7 + 3 + 2 + 2 + 2 + 0 + 2 + 4 + 4 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157322202049) 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, 1918563404 + ... + 1918563485.

It is an arithmetic number, because the mean of its divisors is an integer number (40289832345).

Almost surely, 2^157322202449 is an apocalyptic number.

It is an amenable number.

157322202449 is a deficient number, since it is larger than the sum of its proper divisors (3837126931).

157322202449 is an equidigital number, since it uses as much as digits as its factorization.

157322202449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3837126930.

The product of its (nonzero) digits is 241920, while the sum is 41.

The spelling of 157322202449 in words is "one hundred fifty-seven billion, three hundred twenty-two million, two hundred two thousand, four hundred forty-nine".