1540143455 has 16 divisors (see below), whose sum is σ = 1913755680. Its totient is φ = 1188475008.

The previous prime is 1540143443. The next prime is 1540143481. The reversal of 1540143455 is 5543410451.

It is a cyclic number.

It is not a de Polignac number, because 1540143455 - 2¹⁸ = 1539881311 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 164069 + ... + 173201.

It is an arithmetic number, because the mean of its divisors is an integer number (119609730).

Almost surely, 2^1540143455 is an apocalyptic number.

1540143455 is a deficient number, since it is larger than the sum of its proper divisors (373612225).

1540143455 is a wasteful number, since it uses less digits than its factorization.

1540143455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10330.

The product of its (nonzero) digits is 24000, while the sum is 32.

The square root of 1540143455 is about 39244.6614840796. The cubic root of 1540143455 is about 1154.8362067289.

The spelling of 1540143455 in words is "one billion, five hundred forty million, one hundred forty-three thousand, four hundred fifty-five".