15487488691 has 2 divisors, whose sum is σ = 15487488692. Its totient is φ = 15487488690.

The previous prime is 15487488641. The next prime is 15487488697. The reversal of 15487488691 is 19688478451.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15487488691 - 2¹¹ = 15487486643 is a prime.

It is not a weakly prime, because it can be changed into another prime (15487488697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7743744345 + 7743744346.

It is an arithmetic number, because the mean of its divisors is an integer number (7743744346).

Almost surely, 2^15487488691 is an apocalyptic number.

15487488691 is a deficient number, since it is larger than the sum of its proper divisors (1).

15487488691 is an equidigital number, since it uses as much as digits as its factorization.

15487488691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15482880, while the sum is 61.

The spelling of 15487488691 in words is "fifteen billion, four hundred eighty-seven million, four hundred eighty-eight thousand, six hundred ninety-one".