1065421545540 has 144 divisors (see below), whose sum is σ = 3471917613696. Its totient is φ = 243090805760.

The previous prime is 1065421545499. The next prime is 1065421545541. The reversal of 1065421545540 is 455451245601.

It is a happy number.

It is a super-2 number, since 2×1065421545540² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1065421545492 and 1065421545501.

It is not an unprimeable number, because it can be changed into a prime (1065421545541) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4192824 + ... + 4439663.

It is an arithmetic number, because the mean of its divisors is an integer number (24110538984).

Almost surely, 2^{1065421545540} is an apocalyptic number.

1065421545540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1065421545540 is an abundant number, since it is smaller than the sum of its proper divisors (2406496068156).

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

1065421545540 is a wasteful number, since it uses less digits than its factorization.

1065421545540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8632538 (or 8632525 counting only the distinct ones).

The product of its (nonzero) digits is 480000, while the sum is 42.

The spelling of 1065421545540 in words is "one trillion, sixty-five billion, four hundred twenty-one million, five hundred forty-five thousand, five hundred forty".