5497978511 has 4 divisors (see below), whose sum is σ = 5498203224. Its totient is φ = 5497753800.

The previous prime is 5497978487. The next prime is 5497978513. The reversal of 5497978511 is 1158797945.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5497978511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5497978513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70445 + ... + 126326.

It is an arithmetic number, because the mean of its divisors is an integer number (1374550806).

Almost surely, 2^5497978511 is an apocalyptic number.

5497978511 is a deficient number, since it is larger than the sum of its proper divisors (224713).

5497978511 is a wasteful number, since it uses less digits than its factorization.

5497978511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224712.

The product of its digits is 3175200, while the sum is 56.

The square root of 5497978511 is about 74148.3547423677. The cubic root of 5497978511 is about 1764.9578817589.

The spelling of 5497978511 in words is "five billion, four hundred ninety-seven million, nine hundred seventy-eight thousand, five hundred eleven".