1561001016087 has 24 divisors (see below), whose sum is σ = 2319585496800. Its totient is φ = 1010850684480.

The previous prime is 1561001016079. The next prime is 1561001016089. The reversal of 1561001016087 is 7806101001651.

1561001016087 is a `hidden beast` number, since 1 + 561 + 0 + 0 + 1 + 0 + 16 + 0 + 87 = 666.

It is not a de Polignac number, because 1561001016087 - 2³ = 1561001016079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561001016089) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3713464 + ... + 4112397.

It is an arithmetic number, because the mean of its divisors is an integer number (96649395700).

Almost surely, 2^{1561001016087} is an apocalyptic number.

1561001016087 is a deficient number, since it is larger than the sum of its proper divisors (758584480713).

1561001016087 is a wasteful number, since it uses less digits than its factorization.

1561001016087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7826503 (or 7826500 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 36.

The spelling of 1561001016087 in words is "one trillion, five hundred sixty-one billion, one million, sixteen thousand, eighty-seven".