15515455099 has 2 divisors, whose sum is σ = 15515455100. Its totient is φ = 15515455098.

The previous prime is 15515455073. The next prime is 15515455121. The reversal of 15515455099 is 99055451551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15515455099 - 2¹³ = 15515446907 is a prime.

It is not a weakly prime, because it can be changed into another prime (15515455699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7757727549 + 7757727550.

It is an arithmetic number, because the mean of its divisors is an integer number (7757727550).

Almost surely, 2^15515455099 is an apocalyptic number.

15515455099 is a deficient number, since it is larger than the sum of its proper divisors (1).

15515455099 is an equidigital number, since it uses as much as digits as its factorization.

15515455099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1012500, while the sum is 49.

The spelling of 15515455099 in words is "fifteen billion, five hundred fifteen million, four hundred fifty-five thousand, ninety-nine".