1537138645 has 16 divisors (see below), whose sum is σ = 2199732480. Its totient is φ = 1008209664.

The previous prime is 1537138643. The next prime is 1537138709. The reversal of 1537138645 is 5468317351.

It is not a de Polignac number, because 1537138645 - 2¹ = 1537138643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1537138643) 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, 953940 + ... + 955549.

It is an arithmetic number, because the mean of its divisors is an integer number (137483280).

Almost surely, 2^1537138645 is an apocalyptic number.

It is an amenable number.

1537138645 is a deficient number, since it is larger than the sum of its proper divisors (662593835).

1537138645 is a wasteful number, since it uses less digits than its factorization.

1537138645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1909524.

The product of its digits is 302400, while the sum is 43.

The square root of 1537138645 is about 39206.3597519586. The cubic root of 1537138645 is about 1154.0846917730.

The spelling of 1537138645 in words is "one billion, five hundred thirty-seven million, one hundred thirty-eight thousand, six hundred forty-five".