1653451551 has 18 divisors (see below), whose sum is σ = 2396509440. Its totient is φ = 1098533016.

The previous prime is 1653451517. The next prime is 1653451663. The reversal of 1653451551 is 1551543561.

1653451551 is a `hidden beast` number, since 1 + 6 + 53 + 4 + 51 + 551 = 666.

It is not a de Polignac number, because 1653451551 - 2¹⁰ = 1653450527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1653450551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1292130 + ... + 1293408.

Almost surely, 2^1653451551 is an apocalyptic number.

1653451551 is a deficient number, since it is larger than the sum of its proper divisors (743057889).

1653451551 is an equidigital number, since it uses as much as digits as its factorization.

1653451551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2043 (or 1661 counting only the distinct ones).

The product of its digits is 45000, while the sum is 36.

The square root of 1653451551 is about 40662.6554838712. The cubic root of 1653451551 is about 1182.4891320794.

The spelling of 1653451551 in words is "one billion, six hundred fifty-three million, four hundred fifty-one thousand, five hundred fifty-one".