9157212144 has 120 divisors (see below), whose sum is σ = 26681952960. Its totient is φ = 2928167424.

The previous prime is 9157212137. The next prime is 9157212151. The reversal of 9157212144 is 4412127519.

It is an interprime number because it is at equal distance from previous prime (9157212137) and next prime (9157212151).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 9157212099 and 9157212108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 648649 + ... + 662615.

It is an arithmetic number, because the mean of its divisors is an integer number (222349608).

Almost surely, 2^9157212144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9157212144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13340976480).

9157212144 is an abundant number, since it is smaller than the sum of its proper divisors (17524740816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9157212144 is a wasteful number, since it uses less digits than its factorization.

9157212144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14167 (or 14158 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 9157212144 is about 95693.3234034643. The cubic root of 9157212144 is about 2092.1256232547.

The spelling of 9157212144 in words is "nine billion, one hundred fifty-seven million, two hundred twelve thousand, one hundred forty-four".