1540257271983 has 16 divisors (see below), whose sum is σ = 2281902739200. Its totient is φ = 1026820130040.

The previous prime is 1540257271939. The next prime is 1540257272023. The reversal of 1540257271983 is 3891727520451.

1540257271983 is a `hidden beast` number, since 1 + 5 + 40 + 257 + 271 + 9 + 83 = 666.

It is not a de Polignac number, because 1540257271983 - 2¹⁴ = 1540257255599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540257271913) 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, 1163398 + ... + 2105708.

It is an arithmetic number, because the mean of its divisors is an integer number (142618921200).

Almost surely, 2^{1540257271983} is an apocalyptic number.

1540257271983 is a deficient number, since it is larger than the sum of its proper divisors (741645467217).

1540257271983 is an equidigital number, since it uses as much as digits as its factorization.

1540257271983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002859 (or 1002853 counting only the distinct ones).

The product of its (nonzero) digits is 4233600, while the sum is 54.

The spelling of 1540257271983 in words is "one trillion, five hundred forty billion, two hundred fifty-seven million, two hundred seventy-one thousand, nine hundred eighty-three".