1056659631789 has 16 divisors (see below), whose sum is σ = 1488801631680. Its totient is φ = 664767221760.

The previous prime is 1056659631749. The next prime is 1056659631851. The reversal of 1056659631789 is 9871369566501.

It is not a de Polignac number, because 1056659631789 - 2¹⁶ = 1056659566253 is a prime.

It is a super-2 number, since 2×1056659631789² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1056659631719) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36051282 + ... + 36080579.

It is an arithmetic number, because the mean of its divisors is an integer number (93050101980).

Almost surely, 2^{1056659631789} is an apocalyptic number.

1056659631789 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1056659631789 is a deficient number, since it is larger than the sum of its proper divisors (432141999891).

1056659631789 is a wasteful number, since it uses less digits than its factorization.

1056659631789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72132140.

The product of its (nonzero) digits is 73483200, while the sum is 66.

The spelling of 1056659631789 in words is "one trillion, fifty-six billion, six hundred fifty-nine million, six hundred thirty-one thousand, seven hundred eighty-nine".