157239392685 has 32 divisors (see below), whose sum is σ = 252229386240. Its totient is φ = 83645717568.

The previous prime is 157239392683. The next prime is 157239392689. The reversal of 157239392685 is 586293932751.

157239392685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 157239392685 - 2¹ = 157239392683 is a prime.

It is a super-2 number, since 2×157239392685² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157239392683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28570644 + ... + 28576146.

It is an arithmetic number, because the mean of its divisors is an integer number (7882168320).

Almost surely, 2^157239392685 is an apocalyptic number.

157239392685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

157239392685 is a deficient number, since it is larger than the sum of its proper divisors (94989993555).

157239392685 is a wasteful number, since it uses less digits than its factorization.

157239392685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10057.

The product of its digits is 24494400, while the sum is 60.

The spelling of 157239392685 in words is "one hundred fifty-seven billion, two hundred thirty-nine million, three hundred ninety-two thousand, six hundred eighty-five".