3551217312678 has 128 divisors (see below), whose sum is σ = 8277943910400. Its totient is φ = 994729686912.

The previous prime is 3551217312653. The next prime is 3551217312683. The reversal of 3551217312678 is 8762137121553.

It is a super-2 number, since 2×3551217312678² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3551217312678.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 291005725 + ... + 291017927.

It is an arithmetic number, because the mean of its divisors is an integer number (64671436800).

Almost surely, 2^{3551217312678} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3551217312678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4138971955200).

3551217312678 is an abundant number, since it is smaller than the sum of its proper divisors (4726726597722).

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

3551217312678 is a wasteful number, since it uses less digits than its factorization.

3551217312678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12906.

The product of its digits is 2116800, while the sum is 51.

The spelling of 3551217312678 in words is "three trillion, five hundred fifty-one billion, two hundred seventeen million, three hundred twelve thousand, six hundred seventy-eight".