2638016765 has 8 divisors (see below), whose sum is σ = 3267737088. Its totient is φ = 2042335440.

The previous prime is 2638016741. The next prime is 2638016767. The reversal of 2638016765 is 5676108362.

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

It is not a de Polignac number, because 2638016765 - 2⁸ = 2638016509 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 (2638016767) 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, 8509577 + ... + 8509886.

It is an arithmetic number, because the mean of its divisors is an integer number (408467136).

Almost surely, 2^2638016765 is an apocalyptic number.

It is an amenable number.

2638016765 is a deficient number, since it is larger than the sum of its proper divisors (629720323).

2638016765 is a wasteful number, since it uses less digits than its factorization.

2638016765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17019499.

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 2638016765 is about 51361.6273593429. The cubic root of 2638016765 is about 1381.7384736160.

The spelling of 2638016765 in words is "two billion, six hundred thirty-eight million, sixteen thousand, seven hundred sixty-five".