1632540551 has 4 divisors (see below), whose sum is σ = 1632729672. Its totient is φ = 1632351432.

The previous prime is 1632540521. The next prime is 1632540557. The reversal of 1632540551 is 1550452361.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1632540551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1632540557) 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, 80960 + ... + 99093.

It is an arithmetic number, because the mean of its divisors is an integer number (408182418).

Almost surely, 2^1632540551 is an apocalyptic number.

1632540551 is a deficient number, since it is larger than the sum of its proper divisors (189121).

1632540551 is an equidigital number, since it uses as much as digits as its factorization.

1632540551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189120.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 1632540551 is about 40404.7095151048. The cubic root of 1632540551 is about 1177.4830366454.

The spelling of 1632540551 in words is "one billion, six hundred thirty-two million, five hundred forty thousand, five hundred fifty-one".