15020061649 has 4 divisors (see below), whose sum is σ = 15020516160. Its totient is φ = 15019607140.

The previous prime is 15020061631. The next prime is 15020061673. The reversal of 15020061649 is 94616002051.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 15020061649 - 2⁹ = 15020061137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15020061449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173437 + ... + 245194.

It is an arithmetic number, because the mean of its divisors is an integer number (3755129040).

Almost surely, 2^15020061649 is an apocalyptic number.

It is an amenable number.

15020061649 is a deficient number, since it is larger than the sum of its proper divisors (454511).

15020061649 is an equidigital number, since it uses as much as digits as its factorization.

15020061649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454510.

The product of its (nonzero) digits is 12960, while the sum is 34.

The spelling of 15020061649 in words is "fifteen billion, twenty million, sixty-one thousand, six hundred forty-nine".