2145651413444 has 72 divisors (see below), whose sum is σ = 4918728487680. Its totient is φ = 809001345600.

The previous prime is 2145651413443. The next prime is 2145651413471. The reversal of 2145651413444 is 4443141565412.

It is a super-2 number, since 2×2145651413444² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 2145651413395 and 2145651413404.

It is not an unprimeable number, because it can be changed into a prime (2145651413443) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15984779 + ... + 16118450.

It is an arithmetic number, because the mean of its divisors is an integer number (68315673440).

Almost surely, 2^{2145651413444} is an apocalyptic number.

It is an amenable number.

2145651413444 is an abundant number, since it is smaller than the sum of its proper divisors (2773077074236).

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

2145651413444 is a wasteful number, since it uses less digits than its factorization.

2145651413444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32103289 (or 32103280 counting only the distinct ones).

The product of its digits is 921600, while the sum is 44.

Adding to 2145651413444 its reverse (4443141565412), we get a palindrome (6588792978856).

The spelling of 2145651413444 in words is "two trillion, one hundred forty-five billion, six hundred fifty-one million, four hundred thirteen thousand, four hundred forty-four".