15550117087 has 2 divisors, whose sum is σ = 15550117088. Its totient is φ = 15550117086.

The previous prime is 15550117031. The next prime is 15550117103. The reversal of 15550117087 is 78071105551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15550117087 - 2¹¹ = 15550115039 is a prime.

It is a super-2 number, since 2×15550117087² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15550117487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7775058543 + 7775058544.

It is an arithmetic number, because the mean of its divisors is an integer number (7775058544).

Almost surely, 2^15550117087 is an apocalyptic number.

15550117087 is a deficient number, since it is larger than the sum of its proper divisors (1).

15550117087 is an equidigital number, since it uses as much as digits as its factorization.

15550117087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 49000, while the sum is 40.

The spelling of 15550117087 in words is "fifteen billion, five hundred fifty million, one hundred seventeen thousand, eighty-seven".