1581433796 has 12 divisors (see below), whose sum is σ = 2835009660. Its totient is φ = 771431040.

The previous prime is 1581433753. The next prime is 1581433811. The reversal of 1581433796 is 6973341851.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 448168900 + 1133264896 = 21170^2 + 33664^2 .

It is a super-2 number, since 2×1581433796² = 5001865702261939232, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1581433796.

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, 4821281 + ... + 4821608.

It is an arithmetic number, because the mean of its divisors is an integer number (236250805).

Almost surely, 2^1581433796 is an apocalyptic number.

It is an amenable number.

1581433796 is a deficient number, since it is larger than the sum of its proper divisors (1253575864).

1581433796 is a wasteful number, since it uses less digits than its factorization.

1581433796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9642934 (or 9642932 counting only the distinct ones).

The product of its digits is 544320, while the sum is 47.

The square root of 1581433796 is about 39767.2452654191. The cubic root of 1581433796 is about 1165.0654904946.

The spelling of 1581433796 in words is "one billion, five hundred eighty-one million, four hundred thirty-three thousand, seven hundred ninety-six".