1320077564 has 96 divisors (see below), whose sum is σ = 2694686400. Its totient is φ = 561254400.

The previous prime is 1320077491. The next prime is 1320077621. The reversal of 1320077564 is 4657700231.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3291764 + ... + 3292164.

It is an arithmetic number, because the mean of its divisors is an integer number (28069650).

Almost surely, 2^1320077564 is an apocalyptic number.

It is an amenable number.

1320077564 is an abundant number, since it is smaller than the sum of its proper divisors (1374608836).

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

1320077564 is a wasteful number, since it uses less digits than its factorization.

1320077564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543 (or 541 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 1320077564 is about 36332.8716729080. The cubic root of 1320077564 is about 1096.9827961028.

Adding to 1320077564 its reverse (4657700231), we get a palindrome (5977777795).

The spelling of 1320077564 in words is "one billion, three hundred twenty million, seventy-seven thousand, five hundred sixty-four".