9978655234 has 8 divisors (see below), whose sum is σ = 14980532940. Its totient is φ = 4985144256.

The previous prime is 9978655231. The next prime is 9978655273. The reversal of 9978655234 is 4325568799.

It can be written as a sum of positive squares in 2 ways, for example, as 8510616009 + 1468039225 = 92253^2 + 38315^2 .

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

It is not an unprimeable number, because it can be changed into a prime (9978655231) 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, 2088699 + ... + 2093470.

Almost surely, 2^9978655234 is an apocalyptic number.

9978655234 is a deficient number, since it is larger than the sum of its proper divisors (5001877706).

9978655234 is a wasteful number, since it uses less digits than its factorization.

9978655234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4183364.

The product of its digits is 16329600, while the sum is 58.

The square root of 9978655234 is about 99893.2191592603. The cubic root of 9978655234 is about 2152.9007346390.

The spelling of 9978655234 in words is "nine billion, nine hundred seventy-eight million, six hundred fifty-five thousand, two hundred thirty-four".