867280821123551 has 16 divisors (see below), whose sum is σ = 889825497506400. Its totient is φ = 844802542425600.

The previous prime is 867280821123539. The next prime is 867280821123589. The reversal of 867280821123551 is 155321128082768.

It is a cyclic number.

It is not a de Polignac number, because 867280821123551 - 2¹⁸ = 867280820861407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (867280821123151) 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, 513506795 + ... + 515192963.

It is an arithmetic number, because the mean of its divisors is an integer number (55614093594150).

Almost surely, 2^{867280821123551} is an apocalyptic number.

867280821123551 is a deficient number, since it is larger than the sum of its proper divisors (22544676382849).

867280821123551 is a wasteful number, since it uses less digits than its factorization.

867280821123551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1705850.

The product of its (nonzero) digits is 12902400, while the sum is 59.

The spelling of 867280821123551 in words is "eight hundred sixty-seven trillion, two hundred eighty billion, eight hundred twenty-one million, one hundred twenty-three thousand, five hundred fifty-one".