14650678921 has 2 divisors, whose sum is σ = 14650678922. Its totient is φ = 14650678920.

The previous prime is 14650678901. The next prime is 14650678937. The reversal of 14650678921 is 12987605641.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7461504400 + 7189174521 = 86380^2 + 84789^2 .

It is a cyclic number.

It is not a de Polignac number, because 14650678921 - 2⁹ = 14650678409 is a prime.

It is not a weakly prime, because it can be changed into another prime (14650678901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7325339460 + 7325339461.

It is an arithmetic number, because the mean of its divisors is an integer number (7325339461).

Almost surely, 2^14650678921 is an apocalyptic number.

It is an amenable number.

14650678921 is a deficient number, since it is larger than the sum of its proper divisors (1).

14650678921 is an equidigital number, since it uses as much as digits as its factorization.

14650678921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 14650678921 in words is "fourteen billion, six hundred fifty million, six hundred seventy-eight thousand, nine hundred twenty-one".