3551438531718 has 192 divisors, whose sum is σ = 10017441123840. Its totient is φ = 922244097600.

The previous prime is 3551438531701. The next prime is 3551438531731. The reversal of 3551438531718 is 8171358341553.

3551438531718 is a `hidden beast` number, since 3 + 5 + 5 + 1 + 4 + 38 + 531 + 71 + 8 = 666.

It is a super-2 number, since 2×3551438531718² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 162429655 + ... + 162451517.

It is an arithmetic number, because the mean of its divisors is an integer number (52174172520).

Almost surely, 2^{3551438531718} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3551438531718, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5008720561920).

3551438531718 is an abundant number, since it is smaller than the sum of its proper divisors (6466002592122).

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

3551438531718 is a wasteful number, since it uses less digits than its factorization.

3551438531718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27480 (or 27467 counting only the distinct ones).

The product of its digits is 6048000, while the sum is 54.

The spelling of 3551438531718 in words is "three trillion, five hundred fifty-one billion, four hundred thirty-eight million, five hundred thirty-one thousand, seven hundred eighteen".