7091144921 has 16 divisors (see below), whose sum is σ = 8340630144. Its totient is φ = 5902412544.

The previous prime is 7091144891. The next prime is 7091144933. The reversal of 7091144921 is 1294411907.

It is not a de Polignac number, because 7091144921 - 2¹⁴ = 7091128537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7091144971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16016 + ... + 120161.

It is an arithmetic number, because the mean of its divisors is an integer number (521289384).

Almost surely, 2^7091144921 is an apocalyptic number.

It is an amenable number.

7091144921 is a deficient number, since it is larger than the sum of its proper divisors (1249485223).

7091144921 is a wasteful number, since it uses less digits than its factorization.

7091144921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136400.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 7091144921 is about 84208.9361113178. The cubic root of 7091144921 is about 1921.1979756982.

The spelling of 7091144921 in words is "seven billion, ninety-one million, one hundred forty-four thousand, nine hundred twenty-one".