1540551345 has 8 divisors (see below), whose sum is σ = 2464882176. Its totient is φ = 821627376.

The previous prime is 1540551329. The next prime is 1540551349. The reversal of 1540551345 is 5431550451.

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

It is not a de Polignac number, because 1540551345 - 2⁴ = 1540551329 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1540551349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51351697 + ... + 51351726.

It is an arithmetic number, because the mean of its divisors is an integer number (308110272).

Almost surely, 2^1540551345 is an apocalyptic number.

1540551345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1540551345 is a deficient number, since it is larger than the sum of its proper divisors (924330831).

1540551345 is a wasteful number, since it uses less digits than its factorization.

1540551345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102703431.

The product of its (nonzero) digits is 30000, while the sum is 33.

The square root of 1540551345 is about 39249.8578978319. The cubic root of 1540551345 is about 1154.9381462725.

The spelling of 1540551345 in words is "one billion, five hundred forty million, five hundred fifty-one thousand, three hundred forty-five".