9209212500838 has 12 divisors (see below), whose sum is σ = 16069136098572. Its totient is φ = 3946805357460.

The previous prime is 9209212500833. The next prime is 9209212500841. The reversal of 9209212500838 is 8380052129029.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a junction number, because it is equal to n+sod(n) for n = 9209212500791 and 9209212500800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9209212500833) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 46985777968 + ... + 46985778163.

It is an arithmetic number, because the mean of its divisors is an integer number (1339094674881).

Almost surely, 2^{9209212500838} is an apocalyptic number.

9209212500838 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

9209212500838 is a deficient number, since it is larger than the sum of its proper divisors (6859923597734).

9209212500838 is a wasteful number, since it uses less digits than its factorization.

9209212500838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93971556147 (or 93971556140 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 49.

The spelling of 9209212500838 in words is "nine trillion, two hundred nine billion, two hundred twelve million, five hundred thousand, eight hundred thirty-eight".