9121077672 has 128 divisors (see below), whose sum is σ = 26977689600. Its totient is φ = 2514758400.

The previous prime is 9121077671. The next prime is 9121077697. The reversal of 9121077672 is 2767701219.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (9121077671) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1971522 + ... + 1976142.

It is an arithmetic number, because the mean of its divisors is an integer number (210763200).

Almost surely, 2^9121077672 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 9121077672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13488844800).

9121077672 is an abundant number, since it is smaller than the sum of its proper divisors (17856611928).

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

9121077672 is a wasteful number, since it uses less digits than its factorization.

9121077672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5047 (or 5043 counting only the distinct ones).

The product of its (nonzero) digits is 74088, while the sum is 42.

The square root of 9121077672 is about 95504.3332629468. Note that the first 3 decimals coincide. The cubic root of 9121077672 is about 2089.3701445196.

The spelling of 9121077672 in words is "nine billion, one hundred twenty-one million, seventy-seven thousand, six hundred seventy-two".