1540477457 has 16 divisors (see below), whose sum is σ = 1652078592. Its totient is φ = 1431329280.

The previous prime is 1540477453. The next prime is 1540477511. The reversal of 1540477457 is 7547740451.

It is not a de Polignac number, because 1540477457 - 2² = 1540477453 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1540477453) 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, 443108 + ... + 446570.

It is an arithmetic number, because the mean of its divisors is an integer number (103254912).

Almost surely, 2^1540477457 is an apocalyptic number.

1540477457 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1540477457 is a deficient number, since it is larger than the sum of its proper divisors (111601135).

1540477457 is a wasteful number, since it uses less digits than its factorization.

1540477457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3808.

The product of its (nonzero) digits is 548800, while the sum is 44.

The square root of 1540477457 is about 39248.9166347302. The cubic root of 1540477457 is about 1154.9196815771.

The spelling of 1540477457 in words is "one billion, five hundred forty million, four hundred seventy-seven thousand, four hundred fifty-seven".