5451371978 has 8 divisors (see below), whose sum is σ = 8806062468. Its totient is φ = 2516017824.

The previous prime is 5451371941. The next prime is 5451372007. The reversal of 5451371978 is 8791731545.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3985018129 + 1466353849 = 63127^2 + 38293^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104834051 + ... + 104834102.

Almost surely, 2^5451371978 is an apocalyptic number.

5451371978 is a deficient number, since it is larger than the sum of its proper divisors (3354690490).

5451371978 is a wasteful number, since it uses less digits than its factorization.

5451371978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209668168.

The product of its digits is 1058400, while the sum is 50.

The square root of 5451371978 is about 73833.4069239663. The cubic root of 5451371978 is about 1759.9565220406.

The spelling of 5451371978 in words is "five billion, four hundred fifty-one million, three hundred seventy-one thousand, nine hundred seventy-eight".