1545641631 has 6 divisors (see below), whose sum is σ = 2232593480. Its totient is φ = 1030427748.

The previous prime is 1545641627. The next prime is 1545641651. The reversal of 1545641631 is 1361465451.

1545641631 is a `hidden beast` number, since 1 + 5 + 4 + 5 + 641 + 6 + 3 + 1 = 666.

1545641631 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1545641631 - 2² = 1545641627 is a prime.

It is a super-2 number, since 2×1545641631² = 4778016102960680322, 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 (1545641651) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 85868971 + ... + 85868988.

Almost surely, 2^1545641631 is an apocalyptic number.

1545641631 is a deficient number, since it is larger than the sum of its proper divisors (686951849).

1545641631 is a wasteful number, since it uses less digits than its factorization.

1545641631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171737965 (or 171737962 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 1545641631 is about 39314.6490636760. The cubic root of 1545641631 is about 1156.2087957423.

The spelling of 1545641631 in words is "one billion, five hundred forty-five million, six hundred forty-one thousand, six hundred thirty-one".