764514643 has 4 divisors (see below), whose sum is σ = 780780960. Its totient is φ = 748248328.

The previous prime is 764514613. The next prime is 764514697. The reversal of 764514643 is 346415467.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346415467 = 19 ⋅18232393.

It is a cyclic number.

It is not a de Polignac number, because 764514643 - 2⁹ = 764514131 is a prime.

It is a super-2 number, since 2×764514643² = 1168965278722834898, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 764514596 and 764514605.

It is not an unprimeable number, because it can be changed into a prime (764514613) 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, 8133088 + ... + 8133181.

It is an arithmetic number, because the mean of its divisors is an integer number (195195240).

Almost surely, 2^764514643 is an apocalyptic number.

764514643 is a deficient number, since it is larger than the sum of its proper divisors (16266317).

764514643 is a wasteful number, since it uses less digits than its factorization.

764514643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16266316.

The product of its digits is 241920, while the sum is 40.

The square root of 764514643 is about 27649.8579200690. The cubic root of 764514643 is about 914.3839674787.

The spelling of 764514643 in words is "seven hundred sixty-four million, five hundred fourteen thousand, six hundred forty-three".