1540421940069 has 16 divisors (see below), whose sum is σ = 2402217451200. Its totient is φ = 972898067088.

The previous prime is 1540421940053. The next prime is 1540421940091. The reversal of 1540421940069 is 9600491240451.

1540421940069 is a `hidden beast` number, since 1 + 540 + 4 + 2 + 1 + 9 + 40 + 0 + 69 = 666.

It is not a de Polignac number, because 1540421940069 - 2⁴ = 1540421940053 is a prime.

It is a super-2 number, since 2×1540421940069² (a number of 25 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540421940269) 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, 1501385394 + ... + 1501386419.

It is an arithmetic number, because the mean of its divisors is an integer number (150138590700).

Almost surely, 2^{1540421940069} is an apocalyptic number.

1540421940069 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1540421940069 is a deficient number, since it is larger than the sum of its proper divisors (861795511131).

1540421940069 is a wasteful number, since it uses less digits than its factorization.

1540421940069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3002771841 (or 3002771835 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 1540421940069 in words is "one trillion, five hundred forty billion, four hundred twenty-one million, nine hundred forty thousand, sixty-nine".