769540157 has 8 divisors (see below), whose sum is σ = 775851384. Its totient is φ = 763250688.

The previous prime is 769540129. The next prime is 769540183. The reversal of 769540157 is 751045967.

It can be written as a sum of positive squares in 4 ways, for example, as 52693081 + 716847076 = 7259^2 + 26774^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 769540157 - 2²² = 765345853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (769540657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69773 + ... + 80045.

It is an arithmetic number, because the mean of its divisors is an integer number (96981423).

Almost surely, 2^769540157 is an apocalyptic number.

It is an amenable number.

769540157 is a deficient number, since it is larger than the sum of its proper divisors (6311227).

769540157 is a wasteful number, since it uses less digits than its factorization.

769540157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10879.

The product of its (nonzero) digits is 264600, while the sum is 44.

The square root of 769540157 is about 27740.5868178739. The cubic root of 769540157 is about 916.3831518288.

The spelling of 769540157 in words is "seven hundred sixty-nine million, five hundred forty thousand, one hundred fifty-seven".