1540554493 has 8 divisors (see below), whose sum is σ = 1551373560. Its totient is φ = 1529748480.

The previous prime is 1540554461. The next prime is 1540554503. The reversal of 1540554493 is 3944550451.

It can be written as a sum of positive squares in 4 ways, for example, as 93741124 + 1446813369 = 9682^2 + 38037^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1540554493 - 2⁵ = 1540554461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540554193) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 407733 + ... + 411493.

It is an arithmetic number, because the mean of its divisors is an integer number (193921695).

Almost surely, 2^1540554493 is an apocalyptic number.

It is an amenable number.

1540554493 is a deficient number, since it is larger than the sum of its proper divisors (10819067).

1540554493 is a wasteful number, since it uses less digits than its factorization.

1540554493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6527.

The product of its (nonzero) digits is 216000, while the sum is 40.

The square root of 1540554493 is about 39249.8979998675. The cubic root of 1540554493 is about 1154.9389329482.

The spelling of 1540554493 in words is "one billion, five hundred forty million, five hundred fifty-four thousand, four hundred ninety-three".