157481666401 has 4 divisors (see below), whose sum is σ = 157639622932. Its totient is φ = 157323709872.

The previous prime is 157481666399. The next prime is 157481666413. The reversal of 157481666401 is 104666184751.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 85872441600 + 71609224801 = 293040^2 + 267599^2 .

It is a cyclic number.

It is not a de Polignac number, because 157481666401 - 2¹ = 157481666399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157481666101) 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, 78976770 + ... + 78978763.

It is an arithmetic number, because the mean of its divisors is an integer number (39409905733).

Almost surely, 2^157481666401 is an apocalyptic number.

It is an amenable number.

157481666401 is a deficient number, since it is larger than the sum of its proper divisors (157956531).

157481666401 is an equidigital number, since it uses as much as digits as its factorization.

157481666401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157956530.

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 157481666401 in words is "one hundred fifty-seven billion, four hundred eighty-one million, six hundred sixty-six thousand, four hundred one".