734821128646 has 16 divisors (see below), whose sum is σ = 1217655267840. Its totient is φ = 329781633480.

The previous prime is 734821128637. The next prime is 734821128649. The reversal of 734821128646 is 646821128437.

It is a super-2 number, since 2×734821128646² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 734821128593 and 734821128602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (734821128649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211396746 + ... + 211400221.

It is an arithmetic number, because the mean of its divisors is an integer number (76103454240).

Almost surely, 2^734821128646 is an apocalyptic number.

734821128646 is a deficient number, since it is larger than the sum of its proper divisors (482834139194).

734821128646 is a wasteful number, since it uses less digits than its factorization.

734821128646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422797059.

The product of its digits is 3096576, while the sum is 52.

The spelling of 734821128646 in words is "seven hundred thirty-four billion, eight hundred twenty-one million, one hundred twenty-eight thousand, six hundred forty-six".