15500406091 has 2 divisors, whose sum is σ = 15500406092. Its totient is φ = 15500406090.

The previous prime is 15500406083. The next prime is 15500406139. The reversal of 15500406091 is 19060400551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15500406091 - 2³ = 15500406083 is a prime.

It is not a weakly prime, because it can be changed into another prime (15500404091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7750203045 + 7750203046.

It is an arithmetic number, because the mean of its divisors is an integer number (7750203046).

Almost surely, 2^15500406091 is an apocalyptic number.

15500406091 is a deficient number, since it is larger than the sum of its proper divisors (1).

15500406091 is an equidigital number, since it uses as much as digits as its factorization.

15500406091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 31.

The spelling of 15500406091 in words is "fifteen billion, five hundred million, four hundred six thousand, ninety-one".