1654742505 has 16 divisors (see below), whose sum is σ = 2851248960. Its totient is φ = 814642368.

The previous prime is 1654742491. The next prime is 1654742513. The reversal of 1654742505 is 5052474561.

It is not a de Polignac number, because 1654742505 - 2⁵ = 1654742473 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4242735 + ... + 4243124.

It is an arithmetic number, because the mean of its divisors is an integer number (178203060).

Almost surely, 2^1654742505 is an apocalyptic number.

1654742505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1654742505 is a deficient number, since it is larger than the sum of its proper divisors (1196506455).

1654742505 is a wasteful number, since it uses less digits than its factorization.

1654742505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8485880.

The product of its (nonzero) digits is 168000, while the sum is 39.

The square root of 1654742505 is about 40678.5263376145. The cubic root of 1654742505 is about 1182.7967999914.

The spelling of 1654742505 in words is "one billion, six hundred fifty-four million, seven hundred forty-two thousand, five hundred five".