14761521009 has 9 divisors (see below), whose sum is σ = 21322723513. Its totient is φ = 9840771012.

The previous prime is 14761520987. The next prime is 14761521011. The reversal of 14761521009 is 90012516741.

The square root of 14761521009 is 121497.

It is a perfect power (a square), and thus also a powerful number.

14761521009 is a `hidden beast` number, since 14 + 7 + 615 + 21 + 0 + 0 + 9 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 14761521009 - 2⁷ = 14761520881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14761521109) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 344242 + ... + 384740.

Almost surely, 2^14761521009 is an apocalyptic number.

14761521009 is the 121497-th square number.

14761521009 is the 60749-th centered octagonal number.

It is an amenable number.

14761521009 is a deficient number, since it is larger than the sum of its proper divisors (6561202504).

14761521009 is an frugal number, since it uses more digits than its factorization.

14761521009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81004 (or 40502 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

Multiplying 14761521009 by its sum of digits (36), we get a square (531414756324 = 728982²).

The spelling of 14761521009 in words is "fourteen billion, seven hundred sixty-one million, five hundred twenty-one thousand, nine".