7642776897 has 32 divisors (see below), whose sum is σ = 12945749760. Its totient is φ = 4365411840.

The previous prime is 7642776863. The next prime is 7642776919. The reversal of 7642776897 is 7986772467.

It is not a de Polignac number, because 7642776897 - 2⁷ = 7642776769 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (7642776857) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 510673 + ... + 525425.

It is an arithmetic number, because the mean of its divisors is an integer number (404554680).

Almost surely, 2^7642776897 is an apocalyptic number.

It is an amenable number.

7642776897 is a deficient number, since it is larger than the sum of its proper divisors (5302972863).

7642776897 is a wasteful number, since it uses less digits than its factorization.

7642776897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17510 (or 17504 counting only the distinct ones).

The product of its digits is 49787136, while the sum is 63.

The square root of 7642776897 is about 87422.9769397039. The cubic root of 7642776897 is about 1969.7769935750.

The spelling of 7642776897 in words is "seven billion, six hundred forty-two million, seven hundred seventy-six thousand, eight hundred ninety-seven".