1540254232420 has 12 divisors (see below), whose sum is σ = 3234533888124. Its totient is φ = 616101692960.

The previous prime is 1540254232417. The next prime is 1540254232471. The reversal of 1540254232420 is 242324520451.

It can be written as a sum of positive squares in 2 ways, for example, as 241912487716 + 1298341744704 = 491846^2 + 1139448^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38506355791 + ... + 38506355830.

It is an arithmetic number, because the mean of its divisors is an integer number (269544490677).

Almost surely, 2^{1540254232420} is an apocalyptic number.

1540254232420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1540254232420 is an abundant number, since it is smaller than the sum of its proper divisors (1694279655704).

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

1540254232420 is a wasteful number, since it uses less digits than its factorization.

1540254232420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77012711630 (or 77012711628 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 34.

Adding to 1540254232420 its reverse (242324520451), we get a palindrome (1782578752871).

The spelling of 1540254232420 in words is "one trillion, five hundred forty billion, two hundred fifty-four million, two hundred thirty-two thousand, four hundred twenty".