901996570225 has 9 divisors (see below), whose sum is σ = 1118481635467. Its totient is φ = 721593457240.

The previous prime is 901996570219. The next prime is 901996570249. The reversal of 901996570225 is 522075699109.

The square root of 901996570225 is 949735.

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

It can be written as a sum of positive squares in only one way, i.e., 324718765281 + 577277804944 = 569841^2 + 759788^2 .

It is not a de Polignac number, because 901996570225 - 2⁵ = 901996570193 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4653702 + ... + 4843648.

Almost surely, 2^901996570225 is an apocalyptic number.

901996570225 is the 949735-th square number.

901996570225 is the 474868-th centered octagonal number.

It is an amenable number.

901996570225 is a deficient number, since it is larger than the sum of its proper divisors (216485065242).

901996570225 is an frugal number, since it uses more digits than its factorization.

901996570225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379904 (or 189952 counting only the distinct ones).

The product of its (nonzero) digits is 3061800, while the sum is 55.

The spelling of 901996570225 in words is "nine hundred one billion, nine hundred ninety-six million, five hundred seventy thousand, two hundred twenty-five".