1891554064 has 45 divisors (see below), whose sum is σ = 3738106759. Its totient is φ = 927249440.

The previous prime is 1891554059. The next prime is 1891554073. The reversal of 1891554064 is 4604551981.

The square root of 1891554064 is 43492.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1891554064.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 14439279 + ... + 14439409.

Almost surely, 2^1891554064 is an apocalyptic number.

1891554064 is the 43492-nd square number.

It is an amenable number.

1891554064 is a deficient number, since it is larger than the sum of its proper divisors (1846552695).

1891554064 is an frugal number, since it uses more digits than its factorization.

1891554064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436 (or 216 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 43.

The cubic root of 1891554064 is about 1236.7243722957.

The spelling of 1891554064 in words is "one billion, eight hundred ninety-one million, five hundred fifty-four thousand, sixty-four".