764221135400 has 96 divisors (see below), whose sum is σ = 1808884224000. Its totient is φ = 300182238720.

The previous prime is 764221135273. The next prime is 764221135423. The reversal of 764221135400 is 4531122467.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11022041 + ... + 11091159.

It is an arithmetic number, because the mean of its divisors is an integer number (18842544000).

Almost surely, 2^764221135400 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 764221135400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (904442112000).

764221135400 is an abundant number, since it is smaller than the sum of its proper divisors (1044663088600).

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

764221135400 is a wasteful number, since it uses less digits than its factorization.

764221135400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70131 (or 70122 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 35.

Adding to 764221135400 its reverse (4531122467), we get a palindrome (768752257867).

The spelling of 764221135400 in words is "seven hundred sixty-four billion, two hundred twenty-one million, one hundred thirty-five thousand, four hundred".