275643564 has 48 divisors (see below), whose sum is σ = 773740800. Its totient is φ = 74609856.

The previous prime is 275643541. The next prime is 275643587. The reversal of 275643564 is 465346572.

It is an interprime number because it is at equal distance from previous prime (275643541) and next prime (275643587).

It is a super-3 number, since 3×275643564³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 84759 + ... + 87950.

It is an arithmetic number, because the mean of its divisors is an integer number (16119600).

Almost surely, 2^275643564 is an apocalyptic number.

It is an amenable number.

275643564 is an abundant number, since it is smaller than the sum of its proper divisors (498097236).

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

275643564 is a wasteful number, since it uses less digits than its factorization.

275643564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172742 (or 172740 counting only the distinct ones).

The product of its digits is 604800, while the sum is 42.

The square root of 275643564 is about 16602.5167971606. The cubic root of 275643564 is about 650.8026093322.

The spelling of 275643564 in words is "two hundred seventy-five million, six hundred forty-three thousand, five hundred sixty-four".