157390645 has 4 divisors (see below), whose sum is σ = 188868780. Its totient is φ = 125912512.

The previous prime is 157390643. The next prime is 157390703. The reversal of 157390645 is 546093751.

157390645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 21178404 + 136212241 = 4602^2 + 11671^2 .

It is a cyclic number.

It is not a de Polignac number, because 157390645 - 2¹ = 157390643 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 157390598 and 157390607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157390643) 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, 15739060 + ... + 15739069.

It is an arithmetic number, because the mean of its divisors is an integer number (47217195).

Almost surely, 2^157390645 is an apocalyptic number.

It is an amenable number.

157390645 is a deficient number, since it is larger than the sum of its proper divisors (31478135).

157390645 is an equidigital number, since it uses as much as digits as its factorization.

157390645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31478134.

The product of its (nonzero) digits is 113400, while the sum is 40.

The square root of 157390645 is about 12545.5428340108. The cubic root of 157390645 is about 539.9161335233.

The spelling of 157390645 in words is "one hundred fifty-seven million, three hundred ninety thousand, six hundred forty-five".