157606009787 has 4 divisors (see below), whose sum is σ = 157946412000. Its totient is φ = 157265607576.

The previous prime is 157606009777. The next prime is 157606009789. The reversal of 157606009787 is 787900606751.

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

It is a cyclic number.

It is not a de Polignac number, because 157606009787 - 2⁶ = 157606009723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157606009789) 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, 170200412 + ... + 170201337.

It is an arithmetic number, because the mean of its divisors is an integer number (39486603000).

Almost surely, 2^157606009787 is an apocalyptic number.

157606009787 is a deficient number, since it is larger than the sum of its proper divisors (340402213).

157606009787 is an equidigital number, since it uses as much as digits as its factorization.

157606009787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340402212.

The product of its (nonzero) digits is 4445280, while the sum is 56.

The spelling of 157606009787 in words is "one hundred fifty-seven billion, six hundred six million, nine thousand, seven hundred eighty-seven".