891651156 has 96 divisors (see below), whose sum is σ = 2416563072. Its totient is φ = 252887040.

The previous prime is 891651151. The next prime is 891651161. The reversal of 891651156 is 651156198.

It is an interprime number because it is at equal distance from previous prime (891651151) and next prime (891651161).

It is a super-2 number, since 2×891651156² = 1590083567992272672, which contains 22 as substring.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891651151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 441060 + ... + 443076.

It is an arithmetic number, because the mean of its divisors is an integer number (25172532).

Almost surely, 2^891651156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 891651156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1208281536).

891651156 is an abundant number, since it is smaller than the sum of its proper divisors (1524911916).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

891651156 is a wasteful number, since it uses less digits than its factorization.

891651156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2249 (or 2247 counting only the distinct ones).

The product of its digits is 64800, while the sum is 42.

The square root of 891651156 is about 29860.5283945211. The cubic root of 891651156 is about 962.4946532789.

The spelling of 891651156 in words is "eight hundred ninety-one million, six hundred fifty-one thousand, one hundred fifty-six".