1540163397 has 8 divisors (see below), whose sum is σ = 2055243456. Its totient is φ = 1025929472.

The previous prime is 1540163393. The next prime is 1540163413. The reversal of 1540163397 is 7933610451.

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 1540163397 - 2² = 1540163393 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540163393) 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, 207273 + ... + 214574.

It is an arithmetic number, because the mean of its divisors is an integer number (256905432).

Almost surely, 2^1540163397 is an apocalyptic number.

It is an amenable number.

1540163397 is a deficient number, since it is larger than the sum of its proper divisors (515080059).

1540163397 is a wasteful number, since it uses less digits than its factorization.

1540163397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423067.

The product of its (nonzero) digits is 68040, while the sum is 39.

The square root of 1540163397 is about 39244.9155560309. The cubic root of 1540163397 is about 1154.8411910361.

The spelling of 1540163397 in words is "one billion, five hundred forty million, one hundred sixty-three thousand, three hundred ninety-seven".