5418001978 has 16 divisors (see below), whose sum is σ = 8456960160. Its totient is φ = 2601151056.

The previous prime is 5418001933. The next prime is 5418001987. The reversal of 5418001978 is 8791008145.

It is a happy number.

It is a super-2 number, since 2×5418001978² = 58709490867223824968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 528825 + ... + 538972.

It is an arithmetic number, because the mean of its divisors is an integer number (528560010).

Almost surely, 2^5418001978 is an apocalyptic number.

5418001978 is a deficient number, since it is larger than the sum of its proper divisors (3038958182).

5418001978 is a wasteful number, since it uses less digits than its factorization.

5418001978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1067901.

The product of its (nonzero) digits is 80640, while the sum is 43.

The square root of 5418001978 is about 73607.0783145208. The cubic root of 5418001978 is about 1756.3580398862.

The spelling of 5418001978 in words is "five billion, four hundred eighteen million, one thousand, nine hundred seventy-eight".