1565381412 has 36 divisors (see below), whose sum is σ = 4522213696. Its totient is φ = 447251760.

The previous prime is 1565381399. The next prime is 1565381473. The reversal of 1565381412 is 2141835651.

1565381412 is a `hidden beast` number, since 1 + 565 + 3 + 81 + 4 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×1565381412² = 4900837930070227488, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3105664 + ... + 3106167.

Almost surely, 2^1565381412 is an apocalyptic number.

1565381412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1565381412 is an abundant number, since it is smaller than the sum of its proper divisors (2956832284).

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

1565381412 is a wasteful number, since it uses less digits than its factorization.

1565381412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6211848 (or 6211843 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 1565381412 is about 39564.9012636200. The cubic root of 1565381412 is about 1161.1100679744.

The spelling of 1565381412 in words is "one billion, five hundred sixty-five million, three hundred eighty-one thousand, four hundred twelve".