1640761522 has 16 divisors (see below), whose sum is σ = 2550861720. Its totient is φ = 790881408.

The previous prime is 1640761481. The next prime is 1640761523. The reversal of 1640761522 is 2251670461.

It can be written as a sum of positive squares in 4 ways, for example, as 1478479401 + 162282121 = 38451^2 + 12739^2 .

It is not an unprimeable number, because it can be changed into a prime (1640761523) 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, 93643 + ... + 109774.

Almost surely, 2^1640761522 is an apocalyptic number.

1640761522 is a deficient number, since it is larger than the sum of its proper divisors (910100198).

1640761522 is a wasteful number, since it uses less digits than its factorization.

1640761522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203565.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 1640761522 is about 40506.3145941469. The cubic root of 1640761522 is about 1179.4562087885.

The spelling of 1640761522 in words is "one billion, six hundred forty million, seven hundred sixty-one thousand, five hundred twenty-two".