1540162957 has 4 divisors (see below), whose sum is σ = 1630760796. Its totient is φ = 1449565120.

The previous prime is 1540162927. The next prime is 1540162973. The reversal of 1540162957 is 7592610451.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 666724041 + 873438916 = 25821^2 + 29554^2 .

It is a cyclic number.

It is not a de Polignac number, because 1540162957 - 2¹⁹ = 1539638669 is a prime.

It is a super-2 number, since 2×1540162957² = 4744203868229967698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540162927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45298894 + ... + 45298927.

It is an arithmetic number, because the mean of its divisors is an integer number (407690199).

Almost surely, 2^1540162957 is an apocalyptic number.

1540162957 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1540162957 is a deficient number, since it is larger than the sum of its proper divisors (90597839).

1540162957 is an equidigital number, since it uses as much as digits as its factorization.

1540162957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90597838.

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 1540162957 is about 39244.9099502088. The cubic root of 1540162957 is about 1154.8410810629.

The spelling of 1540162957 in words is "one billion, five hundred forty million, one hundred sixty-two thousand, nine hundred fifty-seven".