201564917144 has 64 divisors (see below), whose sum is σ = 409079665440. Its totient is φ = 92759132160.

The previous prime is 201564917111. The next prime is 201564917167. The reversal of 201564917144 is 441719465102.

It is a super-4 number, since 4×201564917144⁴ (a number of 46 digits) contains 4444 as substring.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 201564917095 and 201564917104.

It is a congruent number.

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, 1364987 + ... + 1505429.

Almost surely, 2^201564917144 is an apocalyptic number.

It is an amenable number.

201564917144 is an abundant number, since it is smaller than the sum of its proper divisors (207514748296).

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

201564917144 is a wasteful number, since it uses less digits than its factorization.

201564917144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140700 (or 140696 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 44.

The spelling of 201564917144 in words is "two hundred one billion, five hundred sixty-four million, nine hundred seventeen thousand, one hundred forty-four".