15345020649 has 32 divisors (see below), whose sum is σ = 23682340864. Its totient is φ = 8656813440.

The previous prime is 15345020629. The next prime is 15345020681. The reversal of 15345020649 is 94602054351.

It is not a de Polignac number, because 15345020649 - 2⁸ = 15345020393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15345020609) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 705237 + ... + 726669.

It is an arithmetic number, because the mean of its divisors is an integer number (740073152).

Almost surely, 2^15345020649 is an apocalyptic number.

It is an amenable number.

15345020649 is a deficient number, since it is larger than the sum of its proper divisors (8337320215).

15345020649 is a wasteful number, since it uses less digits than its factorization.

15345020649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21877.

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 15345020649 in words is "fifteen billion, three hundred forty-five million, twenty thousand, six hundred forty-nine".