7121889506 has 8 divisors (see below), whose sum is σ = 10683477504. Its totient is φ = 3560730340.

The previous prime is 7121889493. The next prime is 7121889521. The reversal of 7121889506 is 6059881217.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61850 + ... + 134421.

It is an arithmetic number, because the mean of its divisors is an integer number (1335434688).

Almost surely, 2^7121889506 is an apocalyptic number.

7121889506 is a deficient number, since it is larger than the sum of its proper divisors (3561587998).

7121889506 is a wasteful number, since it uses less digits than its factorization.

7121889506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214416.

The product of its (nonzero) digits is 241920, while the sum is 47.

The square root of 7121889506 is about 84391.2880930253. The cubic root of 7121889506 is about 1923.9705075779.

The spelling of 7121889506 in words is "seven billion, one hundred twenty-one million, eight hundred eighty-nine thousand, five hundred six".