1654456749 has 16 divisors (see below), whose sum is σ = 2533140480. Its totient is φ = 949926960.

The previous prime is 1654456733. The next prime is 1654456751. The reversal of 1654456749 is 9476544561.

It is a happy number.

It is not a de Polignac number, because 1654456749 - 2⁴ = 1654456733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1654456709) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1318717 + ... + 1319970.

It is an arithmetic number, because the mean of its divisors is an integer number (158321280).

Almost surely, 2^1654456749 is an apocalyptic number.

1654456749 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1654456749 is a deficient number, since it is larger than the sum of its proper divisors (878683731).

1654456749 is a wasteful number, since it uses less digits than its factorization.

1654456749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2638720.

The product of its digits is 3628800, while the sum is 51.

The square root of 1654456749 is about 40675.0138168385. The cubic root of 1654456749 is about 1182.7287106987.

It can be divided in two parts, 1654 and 456749, that added together give a triangular number (458403 = T₉₅₇).

The spelling of 1654456749 in words is "one billion, six hundred fifty-four million, four hundred fifty-six thousand, seven hundred forty-nine".