1540400071403 has 2 divisors, whose sum is σ = 1540400071404. Its totient is φ = 1540400071402.

The previous prime is 1540400071349. The next prime is 1540400071421. The reversal of 1540400071403 is 3041700040451.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1540400071403 - 2¹⁸ = 1540399809259 is a prime.

It is a super-3 number, since 3×1540400071403³ (a number of 38 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1540400071303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770200035701 + 770200035702.

It is an arithmetic number, because the mean of its divisors is an integer number (770200035702).

Almost surely, 2^{1540400071403} is an apocalyptic number.

1540400071403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540400071403 is an equidigital number, since it uses as much as digits as its factorization.

1540400071403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 29.

The spelling of 1540400071403 in words is "one trillion, five hundred forty billion, four hundred million, seventy-one thousand, four hundred three".