280233655641 has 45 divisors (see below), whose sum is σ = 422782221103. Its totient is φ = 184983402240.

The previous prime is 280233655631. The next prime is 280233655657. The reversal of 280233655641 is 146556332082.

The square root of 280233655641 is 529371.

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

280233655641 is a `hidden beast` number, since 2 + 8 + 0 + 23 + 3 + 65 + 564 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 171254441241 + 108979214400 = 413829^2 + 330120^2 .

It is not a de Polignac number, because 280233655641 - 2⁹ = 280233655129 is a prime.

It is a super-2 number, since 2×280233655641² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (280233655601) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 624128185 + ... + 624128633.

Almost surely, 2^280233655641 is an apocalyptic number.

280233655641 is the 529371-st square number.

280233655641 is the 264686-th centered octagonal number.

It is an amenable number.

280233655641 is a deficient number, since it is larger than the sum of its proper divisors (142548565462).

280233655641 is an frugal number, since it uses more digits than its factorization.

280233655641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1172 (or 583 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 45.

The spelling of 280233655641 in words is "two hundred eighty billion, two hundred thirty-three million, six hundred fifty-five thousand, six hundred forty-one".