2169321431256 has 288 divisors, whose sum is σ = 6919941132000. Its totient is φ = 612072502272.

The previous prime is 2169321431227. The next prime is 2169321431269. The reversal of 2169321431256 is 6521341239612.

2169321431256 is a `hidden beast` number, since 2 + 1 + 6 + 9 + 321 + 4 + 312 + 5 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 278507010 + ... + 278514798.

It is an arithmetic number, because the mean of its divisors is an integer number (24027573375).

Almost surely, 2^{2169321431256} 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 2169321431256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3459970566000).

2169321431256 is an abundant number, since it is smaller than the sum of its proper divisors (4750619700744).

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

2169321431256 is a wasteful number, since it uses less digits than its factorization.

2169321431256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8791 (or 8777 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The spelling of 2169321431256 in words is "two trillion, one hundred sixty-nine billion, three hundred twenty-one million, four hundred thirty-one thousand, two hundred fifty-six".