1507601663681 has 4 divisors (see below), whose sum is σ = 1510622910000. Its totient is φ = 1504580417364.

The previous prime is 1507601663669. The next prime is 1507601663713. The reversal of 1507601663681 is 1863661067051.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1507601663681 - 2¹⁰ = 1507601662657 is a prime.

It is a super-2 number, since 2×1507601663681² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1507601665681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1510622411 + ... + 1510623408.

It is an arithmetic number, because the mean of its divisors is an integer number (377655727500).

Almost surely, 2^{1507601663681} is an apocalyptic number.

It is an amenable number.

1507601663681 is a deficient number, since it is larger than the sum of its proper divisors (3021246319).

1507601663681 is an equidigital number, since it uses as much as digits as its factorization.

1507601663681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3021246318.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 1507601663681 in words is "one trillion, five hundred seven billion, six hundred one million, six hundred sixty-three thousand, six hundred eighty-one".