9797779478 has 8 divisors (see below), whose sum is σ = 14755222440. Its totient is φ = 4879372000.

The previous prime is 9797779423. The next prime is 9797779483. The reversal of 9797779478 is 8749777979.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9758243 + ... + 9759246.

It is an arithmetic number, because the mean of its divisors is an integer number (1844402805).

Almost surely, 2^9797779478 is an apocalyptic number.

9797779478 is a deficient number, since it is larger than the sum of its proper divisors (4957442962).

9797779478 is a wasteful number, since it uses less digits than its factorization.

9797779478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19517742.

The product of its digits is 392073696, while the sum is 74.

The square root of 9797779478 is about 98983.7334009988. The cubic root of 9797779478 is about 2139.8133209797.

The spelling of 9797779478 in words is "nine billion, seven hundred ninety-seven million, seven hundred seventy-nine thousand, four hundred seventy-eight".