320011231552 has 56 divisors (see below), whose sum is σ = 650698012800. Its totient is φ = 156066226176.

The previous prime is 320011231493. The next prime is 320011231591. The reversal of 320011231552 is 255132110023.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1897824 + ... + 2059552.

Almost surely, 2^320011231552 is an apocalyptic number.

320011231552 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320011231552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (325349006400).

320011231552 is an abundant number, since it is smaller than the sum of its proper divisors (330686781248).

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

320011231552 is a wasteful number, since it uses less digits than its factorization.

320011231552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162503 (or 162493 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 320011231552 its reverse (255132110023), we get a palindrome (575143341575).

The spelling of 320011231552 in words is "three hundred twenty billion, eleven million, two hundred thirty-one thousand, five hundred fifty-two".