7021564989 has 8 divisors (see below), whose sum is σ = 9372412320. Its totient is φ = 4675880496.

The previous prime is 7021564939. The next prime is 7021564993. The reversal of 7021564989 is 9894651207.

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

It is not a de Polignac number, because 7021564989 - 2¹⁶ = 7021499453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7021564909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1287534 + ... + 1292975.

It is an arithmetic number, because the mean of its divisors is an integer number (1171551540).

Almost surely, 2^7021564989 is an apocalyptic number.

It is an amenable number.

7021564989 is a deficient number, since it is larger than the sum of its proper divisors (2350847331).

7021564989 is a wasteful number, since it uses less digits than its factorization.

7021564989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2581419.

The product of its (nonzero) digits is 1088640, while the sum is 51.

The square root of 7021564989 is about 83794.7790080026. The cubic root of 7021564989 is about 1914.8935661089.

The spelling of 7021564989 in words is "seven billion, twenty-one million, five hundred sixty-four thousand, nine hundred eighty-nine".