1017085638987 has 28 divisors (see below), whose sum is σ = 1663560960984. Its totient is φ = 616415533920.

The previous prime is 1017085638973. The next prime is 1017085639049. The reversal of 1017085638987 is 7898365807101.

1017085638987 is a `hidden beast` number, since 1 + 0 + 170 + 8 + 5 + 6 + 389 + 87 = 666.

It is not a de Polignac number, because 1017085638987 - 2¹¹ = 1017085636939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1017085637987) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 63409218 + ... + 63425255.

Almost surely, 2^{1017085638987} is an apocalyptic number.

1017085638987 is a deficient number, since it is larger than the sum of its proper divisors (646475321997).

1017085638987 is an equidigital number, since it uses as much as digits as its factorization.

1017085638987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126834502 (or 126834487 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 63.

The spelling of 1017085638987 in words is "one trillion, seventeen billion, eighty-five million, six hundred thirty-eight thousand, nine hundred eighty-seven".