1545656738 has 4 divisors (see below), whose sum is σ = 2318485110. Its totient is φ = 772828368.

The previous prime is 1545656731. The next prime is 1545656753. The reversal of 1545656738 is 8376565451.

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

It can be written as a sum of positive squares in only one way, i.e., 961806169 + 583850569 = 31013^2 + 24163^2 .

It is not an unprimeable number, because it can be changed into a prime (1545656731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 386414183 + ... + 386414186.

Almost surely, 2^1545656738 is an apocalyptic number.

1545656738 is a deficient number, since it is larger than the sum of its proper divisors (772828372).

1545656738 is an equidigital number, since it uses as much as digits as its factorization.

1545656738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772828371.

The product of its digits is 3024000, while the sum is 50.

The square root of 1545656738 is about 39314.8411926082. The cubic root of 1545656738 is about 1156.2125626330.

The spelling of 1545656738 in words is "one billion, five hundred forty-five million, six hundred fifty-six thousand, seven hundred thirty-eight".