15545103979 has 2 divisors, whose sum is σ = 15545103980. Its totient is φ = 15545103978.

The previous prime is 15545103949. The next prime is 15545104009. The reversal of 15545103979 is 97930154551.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (15545103949) and next prime (15545104009).

It is an emirp because it is prime and its reverse (97930154551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15545103979 - 2⁷ = 15545103851 is a prime.

It is not a weakly prime, because it can be changed into another prime (15545103949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7772551989 + 7772551990.

It is an arithmetic number, because the mean of its divisors is an integer number (7772551990).

Almost surely, 2^15545103979 is an apocalyptic number.

15545103979 is a deficient number, since it is larger than the sum of its proper divisors (1).

15545103979 is an equidigital number, since it uses as much as digits as its factorization.

15545103979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 850500, while the sum is 49.

The spelling of 15545103979 in words is "fifteen billion, five hundred forty-five million, one hundred three thousand, nine hundred seventy-nine".