1540258138425 has 12 divisors (see below), whose sum is σ = 2546560122320. Its totient is φ = 821471007120.

The previous prime is 1540258138423. The next prime is 1540258138439. The reversal of 1540258138425 is 5248318520451.

It is not a de Polignac number, because 1540258138425 - 2¹ = 1540258138423 is a prime.

It is a super-2 number, since 2×1540258138425² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1540258138423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10268387515 + ... + 10268387664.

Almost surely, 2^{1540258138425} is an apocalyptic number.

1540258138425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1540258138425 is a deficient number, since it is larger than the sum of its proper divisors (1006301983895).

1540258138425 is a wasteful number, since it uses less digits than its factorization.

1540258138425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20536775192 (or 20536775187 counting only the distinct ones).

The product of its (nonzero) digits is 1536000, while the sum is 48.

The spelling of 1540258138425 in words is "one trillion, five hundred forty billion, two hundred fifty-eight million, one hundred thirty-eight thousand, four hundred twenty-five".