1654431616 has 32 divisors (see below), whose sum is σ = 3385027080. Its totient is φ = 804856320.

The previous prime is 1654431557. The next prime is 1654431637. The reversal of 1654431616 is 6161344561.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169930 + ... + 179401.

Almost surely, 2^1654431616 is an apocalyptic number.

1654431616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1654431616 is an abundant number, since it is smaller than the sum of its proper divisors (1730595464).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1654431616 is an equidigital number, since it uses as much as digits as its factorization.

1654431616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349382 (or 349370 counting only the distinct ones).

The product of its digits is 51840, while the sum is 37.

The square root of 1654431616 is about 40674.7048667842. The cubic root of 1654431616 is about 1182.7227216893.

The spelling of 1654431616 in words is "one billion, six hundred fifty-four million, four hundred thirty-one thousand, six hundred sixteen".