15345544013 has 2 divisors, whose sum is σ = 15345544014. Its totient is φ = 15345544012.

The previous prime is 15345544007. The next prime is 15345544061. The reversal of 15345544013 is 31044554351.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15198698089 + 146845924 = 123283^2 + 12118^2 .

It is a cyclic number.

It is not a de Polignac number, because 15345544013 - 2¹⁸ = 15345281869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15345544073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7672772006 + 7672772007.

It is an arithmetic number, because the mean of its divisors is an integer number (7672772007).

Almost surely, 2^15345544013 is an apocalyptic number.

It is an amenable number.

15345544013 is a deficient number, since it is larger than the sum of its proper divisors (1).

15345544013 is an equidigital number, since it uses as much as digits as its factorization.

15345544013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72000, while the sum is 35.

The spelling of 15345544013 in words is "fifteen billion, three hundred forty-five million, five hundred forty-four thousand, thirteen".