2891561140026 has 64 divisors (see below), whose sum is σ = 6920867116800. Its totient is φ = 889596468288.

The previous prime is 2891561140019. The next prime is 2891561140033. The reversal of 2891561140026 is 6200411651982.

2891561140026 is a `hidden beast` number, since 2 + 8 + 9 + 1 + 5 + 611 + 4 + 0 + 0 + 26 = 666.

It is an interprime number because it is at equal distance from previous prime (2891561140019) and next prime (2891561140033).

It is a super-2 number, since 2×2891561140026² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5268195 + ... + 5791113.

It is an arithmetic number, because the mean of its divisors is an integer number (108138548700).

Almost surely, 2^{2891561140026} is an apocalyptic number.

2891561140026 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2891561140026 is an abundant number, since it is smaller than the sum of its proper divisors (4029305976774).

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

2891561140026 is a wasteful number, since it uses less digits than its factorization.

2891561140026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530820 (or 530814 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 2891561140026 in words is "two trillion, eight hundred ninety-one billion, five hundred sixty-one million, one hundred forty thousand, twenty-six".