1056171867997 has 8 divisors (see below), whose sum is σ = 1118321214912. Its totient is φ = 994024920000.

The previous prime is 1056171867973. The next prime is 1056171868033. The reversal of 1056171867997 is 7997681716501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1056171867997 is a prime.

It is a super-2 number, since 2×1056171867997² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1056171867917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 349672 + ... + 1494862.

It is an arithmetic number, because the mean of its divisors is an integer number (139790151864).

Almost surely, 2^{1056171867997} is an apocalyptic number.

1056171867997 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1056171867997 is a deficient number, since it is larger than the sum of its proper divisors (62149346915).

1056171867997 is a wasteful number, since it uses less digits than its factorization.

1056171867997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1199459.

The product of its (nonzero) digits is 40007520, while the sum is 67.

The spelling of 1056171867997 in words is "one trillion, fifty-six billion, one hundred seventy-one million, eight hundred sixty-seven thousand, nine hundred ninety-seven".