1587720855667 has 64 divisors (see below), whose sum is σ = 1780442726400. Its totient is φ = 1409023365120.

The previous prime is 1587720855629. The next prime is 1587720855703. The reversal of 1587720855667 is 7665580277851.

It is not a de Polignac number, because 1587720855667 - 2¹¹ = 1587720853619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1587720855767) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1231745559 + ... + 1231746847.

It is an arithmetic number, because the mean of its divisors is an integer number (27819417600).

Almost surely, 2^{1587720855667} is an apocalyptic number.

1587720855667 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1587720855667 is a deficient number, since it is larger than the sum of its proper divisors (192721870733).

1587720855667 is a wasteful number, since it uses less digits than its factorization.

1587720855667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1756.

The product of its (nonzero) digits is 197568000, while the sum is 67.

The spelling of 1587720855667 in words is "one trillion, five hundred eighty-seven billion, seven hundred twenty million, eight hundred fifty-five thousand, six hundred sixty-seven".