2165962765520 has 80 divisors (see below), whose sum is σ = 5227321644288. Its totient is φ = 834050449920.

The previous prime is 2165962765517. The next prime is 2165962765619. The reversal of 2165962765520 is 255672695612.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4492394 + ... + 4951113.

Almost surely, 2^{2165962765520} is an apocalyptic number.

2165962765520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2165962765520 is an abundant number, since it is smaller than the sum of its proper divisors (3061358878768).

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

2165962765520 is a wasteful number, since it uses less digits than its factorization.

2165962765520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9443628 (or 9443622 counting only the distinct ones).

The product of its (nonzero) digits is 13608000, while the sum is 56.

The spelling of 2165962765520 in words is "two trillion, one hundred sixty-five billion, nine hundred sixty-two million, seven hundred sixty-five thousand, five hundred twenty".