2640533463 has 12 divisors (see below), whose sum is σ = 3819274680. Its totient is φ = 1757969136.

The previous prime is 2640533447. The next prime is 2640533473. The reversal of 2640533463 is 3643350462.

2640533463 is a `hidden beast` number, since 2 + 64 + 0 + 533 + 4 + 63 = 666.

It is not a de Polignac number, because 2640533463 - 2⁴ = 2640533447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640533473) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 191856 + ... + 205157.

It is an arithmetic number, because the mean of its divisors is an integer number (318272890).

Almost surely, 2^2640533463 is an apocalyptic number.

2640533463 is a deficient number, since it is larger than the sum of its proper divisors (1178741217).

2640533463 is a wasteful number, since it uses less digits than its factorization.

2640533463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397758 (or 397755 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 36.

The square root of 2640533463 is about 51386.1213072168. The cubic root of 2640533463 is about 1382.1777320333.

The spelling of 2640533463 in words is "two billion, six hundred forty million, five hundred thirty-three thousand, four hundred sixty-three".