157628886028513 has 4 divisors (see below), whose sum is σ = 157649855689620. Its totient is φ = 157607916367408.

The previous prime is 157628886028507. The next prime is 157628886028517. The reversal of 157628886028513 is 315820688826751.

It is a happy number.

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 94553394956449 + 63075491072064 = 9723857^2 + 7942008^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157628886028513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157628886028517) 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, 10484819278 + ... + 10484834311.

It is an arithmetic number, because the mean of its divisors is an integer number (39412463922405).

Almost surely, 2^{157628886028513} is an apocalyptic number.

It is an amenable number.

157628886028513 is a deficient number, since it is larger than the sum of its proper divisors (20969661107).

157628886028513 is an equidigital number, since it uses as much as digits as its factorization.

157628886028513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20969661106.

The product of its (nonzero) digits is 309657600, while the sum is 70.

The spelling of 157628886028513 in words is "one hundred fifty-seven trillion, six hundred twenty-eight billion, eight hundred eighty-six million, twenty-eight thousand, five hundred thirteen".