5451027978 has 64 divisors (see below), whose sum is σ = 12405467520. Its totient is φ = 1594799360.

The previous prime is 5451027977. The next prime is 5451028001. The reversal of 5451027978 is 8797201545.

It is not an unprimeable number, because it can be changed into a prime (5451027977) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 219826 + ... + 243362.

It is an arithmetic number, because the mean of its divisors is an integer number (193835430).

Almost surely, 2^5451027978 is an apocalyptic number.

5451027978 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 5451027978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6202733760).

5451027978 is an abundant number, since it is smaller than the sum of its proper divisors (6954439542).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5451027978 is a wasteful number, since it uses less digits than its factorization.

5451027978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23604 (or 23582 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 48.

The square root of 5451027978 is about 73831.0773184301. The cubic root of 5451027978 is about 1759.9195015266.

The spelling of 5451027978 in words is "five billion, four hundred fifty-one million, twenty-seven thousand, nine hundred seventy-eight".