6749421811626 has 128 divisors (see below), whose sum is σ = 15417853581312. Its totient is φ = 1954907136000.

The previous prime is 6749421811597. The next prime is 6749421811661. The reversal of 6749421811626 is 6261181249476.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 33308496 + ... + 33510516.

It is an arithmetic number, because the mean of its divisors is an integer number (120451981104).

Almost surely, 2^{6749421811626} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6749421811626, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7708926790656).

6749421811626 is an abundant number, since it is smaller than the sum of its proper divisors (8668431769686).

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

6749421811626 is a wasteful number, since it uses less digits than its factorization.

6749421811626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202448.

The product of its digits is 6967296, while the sum is 57.

The spelling of 6749421811626 in words is "six trillion, seven hundred forty-nine billion, four hundred twenty-one million, eight hundred eleven thousand, six hundred twenty-six".