768191551 has 4 divisors (see below), whose sum is σ = 769288104. Its totient is φ = 767095000.

The previous prime is 768191533. The next prime is 768191579. The reversal of 768191551 is 155191867.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155191867 = 19 ⋅8167993.

It is a cyclic number.

It is not a de Polignac number, because 768191551 - 2¹³ = 768183359 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 768191498 and 768191507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (768191591) 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, 547225 + ... + 548626.

It is an arithmetic number, because the mean of its divisors is an integer number (192322026).

Almost surely, 2^768191551 is an apocalyptic number.

768191551 is a deficient number, since it is larger than the sum of its proper divisors (1096553).

768191551 is a wasteful number, since it uses less digits than its factorization.

768191551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096552.

The product of its digits is 75600, while the sum is 43.

The square root of 768191551 is about 27716.2687063032. The cubic root of 768191551 is about 915.8475235324.

The spelling of 768191551 in words is "seven hundred sixty-eight million, one hundred ninety-one thousand, five hundred fifty-one".