157250404561 has 4 divisors (see below), whose sum is σ = 161085780324. Its totient is φ = 153415028800.

The previous prime is 157250404541. The next prime is 157250404567. The reversal of 157250404561 is 165404052751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 165404052751 = 7 ⋅23629150393.

It can be written as a sum of positive squares in 2 ways, for example, as 10374441025 + 146875963536 = 101855^2 + 383244^2 .

It is a cyclic number.

It is not a de Polignac number, because 157250404561 - 2⁵ = 157250404529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157250404567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1917687820 + ... + 1917687901.

It is an arithmetic number, because the mean of its divisors is an integer number (40271445081).

Almost surely, 2^157250404561 is an apocalyptic number.

It is an amenable number.

157250404561 is a deficient number, since it is larger than the sum of its proper divisors (3835375763).

157250404561 is an equidigital number, since it uses as much as digits as its factorization.

157250404561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3835375762.

The product of its (nonzero) digits is 168000, while the sum is 40.

The spelling of 157250404561 in words is "one hundred fifty-seven billion, two hundred fifty million, four hundred four thousand, five hundred sixty-one".