8157937749 has 16 divisors (see below), whose sum is σ = 11783284800. Its totient is φ = 5020265328.

The previous prime is 8157937727. The next prime is 8157937751. The reversal of 8157937749 is 9477397518.

It is not a de Polignac number, because 8157937749 - 2¹¹ = 8157935701 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8157937692 and 8157937701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8157937789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 612279 + ... + 625460.

It is an arithmetic number, because the mean of its divisors is an integer number (736455300).

Almost surely, 2^8157937749 is an apocalyptic number.

It is an amenable number.

8157937749 is a deficient number, since it is larger than the sum of its proper divisors (3625347051).

8157937749 is a wasteful number, since it uses less digits than its factorization.

8157937749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1237781 (or 1237755 counting only the distinct ones).

The product of its digits is 13335840, while the sum is 60.

The square root of 8157937749 is about 90321.3028526493. The cubic root of 8157937749 is about 2013.0758044476.

The spelling of 8157937749 in words is "eight billion, one hundred fifty-seven million, nine hundred thirty-seven thousand, seven hundred forty-nine".