9777142928446 has 12 divisors (see below), whose sum is σ = 15331077618192. Its totient is φ = 4676024878316.

The previous prime is 9777142928437. The next prime is 9777142928477. The reversal of 9777142928446 is 6448292417779.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4620576886 + ... + 4620579001.

It is an arithmetic number, because the mean of its divisors is an integer number (1277589801516).

Almost surely, 2^{9777142928446} is an apocalyptic number.

9777142928446 is a deficient number, since it is larger than the sum of its proper divisors (5553934689746).

9777142928446 is a wasteful number, since it uses less digits than its factorization.

9777142928446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9241155935 (or 9241155912 counting only the distinct ones).

The product of its digits is 341397504, while the sum is 70.

The spelling of 9777142928446 in words is "nine trillion, seven hundred seventy-seven billion, one hundred forty-two million, nine hundred twenty-eight thousand, four hundred forty-six".