9778997486 has 4 divisors (see below), whose sum is σ = 14668496232. Its totient is φ = 4889498742.

The previous prime is 9778997477. The next prime is 9778997497. The reversal of 9778997486 is 6847998779.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2444749370 + ... + 2444749373.

It is an arithmetic number, because the mean of its divisors is an integer number (3667124058).

Almost surely, 2^9778997486 is an apocalyptic number.

9778997486 is a deficient number, since it is larger than the sum of its proper divisors (4889498746).

9778997486 is a wasteful number, since it uses less digits than its factorization.

9778997486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4889498745.

The product of its digits is 384072192, while the sum is 74.

The square root of 9778997486 is about 98888.8137556519. The cubic root of 9778997486 is about 2138.4451312093.

The spelling of 9778997486 in words is "nine billion, seven hundred seventy-eight million, nine hundred ninety-seven thousand, four hundred eighty-six".