1654040631 has 4 divisors (see below), whose sum is σ = 2205387512. Its totient is φ = 1102693752.

The previous prime is 1654040621. The next prime is 1654040639. The reversal of 1654040631 is 1360404561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1360404561 = 3 ⋅453468187.

It is not a de Polignac number, because 1654040631 - 2⁷ = 1654040503 is a prime.

It is a super-2 number, since 2×1654040631² = 5471700817997756322, 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 (1654040639) 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, 275673436 + ... + 275673441.

It is an arithmetic number, because the mean of its divisors is an integer number (551346878).

Almost surely, 2^1654040631 is an apocalyptic number.

1654040631 is a deficient number, since it is larger than the sum of its proper divisors (551346881).

1654040631 is an equidigital number, since it uses as much as digits as its factorization.

1654040631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551346880.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 1654040631 is about 40669.8983401729. The cubic root of 1654040631 is about 1182.6295450213.

The spelling of 1654040631 in words is "one billion, six hundred fifty-four million, forty thousand, six hundred thirty-one".