32378400451 has 4 divisors (see below), whose sum is σ = 33131386552. Its totient is φ = 31625414352.

The previous prime is 32378400427. The next prime is 32378400463. The reversal of 32378400451 is 15400487323.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 32378400451 - 2⁵ = 32378400419 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 32378400451.

It is not an unprimeable number, because it can be changed into a prime (32378400751) 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, 376492986 + ... + 376493071.

It is an arithmetic number, because the mean of its divisors is an integer number (8282846638).

Almost surely, 2^32378400451 is an apocalyptic number.

32378400451 is a deficient number, since it is larger than the sum of its proper divisors (752986101).

32378400451 is an equidigital number, since it uses as much as digits as its factorization.

32378400451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752986100.

The product of its (nonzero) digits is 80640, while the sum is 37.

Adding to 32378400451 its reverse (15400487323), we get a palindrome (47778887774).

The spelling of 32378400451 in words is "thirty-two billion, three hundred seventy-eight million, four hundred thousand, four hundred fifty-one".