32406787481 has 4 divisors (see below), whose sum is σ = 32410385700. Its totient is φ = 32403189264.

The previous prime is 32406787453. The next prime is 32406787487. The reversal of 32406787481 is 18478760423.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23746810000 + 8659977481 = 154100^2 + 93059^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-32406787481 is a prime.

It is a super-2 number, since 2×32406787481² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32406787487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1785566 + ... + 1803623.

It is an arithmetic number, because the mean of its divisors is an integer number (8102596425).

Almost surely, 2^32406787481 is an apocalyptic number.

It is an amenable number.

32406787481 is a deficient number, since it is larger than the sum of its proper divisors (3598219).

32406787481 is an equidigital number, since it uses as much as digits as its factorization.

32406787481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3598218.

The product of its (nonzero) digits is 1806336, while the sum is 50.

The spelling of 32406787481 in words is "thirty-two billion, four hundred six million, seven hundred eighty-seven thousand, four hundred eighty-one".