1900540564 has 12 divisors (see below), whose sum is σ = 3581788084. Its totient is φ = 877172544.

The previous prime is 1900540519. The next prime is 1900540573. The reversal of 1900540564 is 4650450091.

It can be written as a sum of positive squares in 2 ways, for example, as 557904400 + 1342636164 = 23620^2 + 36642^2 .

It is a super-2 number, since 2×1900540564² = 7224108870818876192, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18274377 + ... + 18274480.

Almost surely, 2^1900540564 is an apocalyptic number.

It is an amenable number.

1900540564 is a deficient number, since it is larger than the sum of its proper divisors (1681247520).

1900540564 is a wasteful number, since it uses less digits than its factorization.

1900540564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36548874 (or 36548872 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 1900540564 is about 43595.1896887719. The cubic root of 1900540564 is about 1238.6797785289.

The spelling of 1900540564 in words is "one billion, nine hundred million, five hundred forty thousand, five hundred sixty-four".