9977916212 has 24 divisors (see below), whose sum is σ = 19876957632. Its totient is φ = 4338224000.

The previous prime is 9977916211. The next prime is 9977916287. The reversal of 9977916212 is 2126197799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9977916211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4928789 + ... + 4930812.

It is an arithmetic number, because the mean of its divisors is an integer number (828206568).

Almost surely, 2^9977916212 is an apocalyptic number.

9977916212 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

9977916212 is a deficient number, since it is larger than the sum of its proper divisors (9899041420).

9977916212 is a wasteful number, since it uses less digits than its factorization.

9977916212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9859639 (or 9859637 counting only the distinct ones).

The product of its digits is 857304, while the sum is 53.

The square root of 9977916212 is about 99889.5200308821. The cubic root of 9977916212 is about 2152.8475851832.

The spelling of 9977916212 in words is "nine billion, nine hundred seventy-seven million, nine hundred sixteen thousand, two hundred twelve".