1949205564 has 72 divisors (see below), whose sum is σ = 5161508352. Its totient is φ = 619053600.

The previous prime is 1949205527. The next prime is 1949205571. The reversal of 1949205564 is 4655029491.

1949205564 is a `hidden beast` number, since 1 + 9 + 4 + 92 + 0 + 556 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 213289 + ... + 222239.

It is an arithmetic number, because the mean of its divisors is an integer number (71687616).

Almost surely, 2^1949205564 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1949205564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2580754176).

1949205564 is an abundant number, since it is smaller than the sum of its proper divisors (3212302788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1949205564 is a wasteful number, since it uses less digits than its factorization.

1949205564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9247 (or 9242 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The square root of 1949205564 is about 44149.8081989039. The cubic root of 1949205564 is about 1249.1632937164.

The spelling of 1949205564 in words is "one billion, nine hundred forty-nine million, two hundred five thousand, five hundred sixty-four".