5451489780 has 48 divisors (see below), whose sum is σ = 16651825344. Its totient is φ = 1321573120.

The previous prime is 5451489767. The next prime is 5451489787. The reversal of 5451489780 is 879841545.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5451489787) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 4129257 + ... + 4130576.

It is an arithmetic number, because the mean of its divisors is an integer number (346913028).

Almost surely, 2^5451489780 is an apocalyptic number.

It is an amenable number.

5451489780 is an abundant number, since it is smaller than the sum of its proper divisors (11200335564).

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

5451489780 is a wasteful number, since it uses less digits than its factorization.

5451489780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8259856 (or 8259854 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 51.

The square root of 5451489780 is about 73834.2046750691. The cubic root of 5451489780 is about 1759.9691992716.

The spelling of 5451489780 in words is "five billion, four hundred fifty-one million, four hundred eighty-nine thousand, seven hundred eighty".