2165351401356 has 48 divisors (see below), whose sum is σ = 5935788461568. Its totient is φ = 605692699200.

The previous prime is 2165351401349. The next prime is 2165351401357. The reversal of 2165351401356 is 6531041535612.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2165351401357) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 630928180 + ... + 630931611.

It is an arithmetic number, because the mean of its divisors is an integer number (123662259616).

Almost surely, 2^{2165351401356} is an apocalyptic number.

2165351401356 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2165351401356 is an abundant number, since it is smaller than the sum of its proper divisors (3770437060212).

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

2165351401356 is a wasteful number, since it uses less digits than its factorization.

2165351401356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1261859822 (or 1261859820 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 42.

Adding to 2165351401356 its reverse (6531041535612), we get a palindrome (8696392936968).

The spelling of 2165351401356 in words is "two trillion, one hundred sixty-five billion, three hundred fifty-one million, four hundred one thousand, three hundred fifty-six".