5491278386 has 12 divisors (see below), whose sum is σ = 9053802366. Its totient is φ = 2496035520.

The previous prime is 5491278347. The next prime is 5491278389. The reversal of 5491278386 is 6838721945.

It can be written as a sum of positive squares in only one way, i.e., 3534897025 + 1956381361 = 59455^2 + 44231^2 .

It is not an unprimeable number, because it can be changed into a prime (5491278389) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11345375 + ... + 11345858.

Almost surely, 2^5491278386 is an apocalyptic number.

5491278386 is a deficient number, since it is larger than the sum of its proper divisors (3562523980).

5491278386 is a wasteful number, since it uses less digits than its factorization.

5491278386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22691257 (or 22691246 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 53.

The square root of 5491278386 is about 74103.1604319276. The cubic root of 5491278386 is about 1764.2406335704.

The spelling of 5491278386 in words is "five billion, four hundred ninety-one million, two hundred seventy-eight thousand, three hundred eighty-six".