1322278359920 has 40 divisors (see below), whose sum is σ = 3513482500704. Its totient is φ = 453352580352.

The previous prime is 1322278359911. The next prime is 1322278359923. The reversal of 1322278359920 is 299538722231.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×1322278359920² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1322278359923) 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, 1180605119 + ... + 1180606238.

Almost surely, 2^{1322278359920} is an apocalyptic number.

1322278359920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1322278359920 is an abundant number, since it is smaller than the sum of its proper divisors (2191204140784).

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

1322278359920 is a wasteful number, since it uses less digits than its factorization.

1322278359920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2361211377 (or 2361211371 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 53.

The spelling of 1322278359920 in words is "one trillion, three hundred twenty-two billion, two hundred seventy-eight million, three hundred fifty-nine thousand, nine hundred twenty".