6905907157 has 4 divisors (see below), whose sum is σ = 6929477100. Its totient is φ = 6882337216.

The previous prime is 6905907139. The next prime is 6905907167. The reversal of 6905907157 is 7517095096.

6905907157 is digitally balanced in base 3, 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 6457568881 + 448338276 = 80359^2 + 21174^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6905907157 is a prime.

It is a super-2 number, since 2×6905907157² = 95383107322207645298, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6905907157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6905907167) 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, 11784532 + ... + 11785117.

It is an arithmetic number, because the mean of its divisors is an integer number (1732369275).

Almost surely, 2^6905907157 is an apocalyptic number.

It is an amenable number.

6905907157 is a deficient number, since it is larger than the sum of its proper divisors (23569943).

6905907157 is a wasteful number, since it uses less digits than its factorization.

6905907157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23569942.

The product of its (nonzero) digits is 595350, while the sum is 49.

The square root of 6905907157 is about 83101.7879290211. The cubic root of 6905907157 is about 1904.3213880196.

The spelling of 6905907157 in words is "six billion, nine hundred five million, nine hundred seven thousand, one hundred fifty-seven".