1540263655340 has 24 divisors (see below), whose sum is σ = 3235602963600. Its totient is φ = 615905597888.

The previous prime is 1540263655289. The next prime is 1540263655351. The reversal of 1540263655340 is 435563620451.

It is a super-2 number, since 2×1540263655340² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1540263655291 and 1540263655300.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12428315 + ... + 12551634.

It is an arithmetic number, because the mean of its divisors is an integer number (134816790150).

Almost surely, 2^{1540263655340} is an apocalyptic number.

1540263655340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1540263655340 is an abundant number, since it is smaller than the sum of its proper divisors (1695339308260).

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

1540263655340 is a wasteful number, since it uses less digits than its factorization.

1540263655340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24983041 (or 24983039 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 44.

The spelling of 1540263655340 in words is "one trillion, five hundred forty billion, two hundred sixty-three million, six hundred fifty-five thousand, three hundred forty".