280605855453 has 32 divisors (see below), whose sum is σ = 466546283520. Its totient is φ = 145742837760.

The previous prime is 280605855421. The next prime is 280605855457. The reversal of 280605855453 is 354558506082.

It is a happy number.

It is not a de Polignac number, because 280605855453 - 2⁵ = 280605855421 is a prime.

It is a super-2 number, since 2×280605855453² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 280605855396 and 280605855405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280605855457) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1199901 + ... + 1414557.

It is an arithmetic number, because the mean of its divisors is an integer number (14579571360).

Almost surely, 2^280605855453 is an apocalyptic number.

It is an amenable number.

280605855453 is a deficient number, since it is larger than the sum of its proper divisors (185940428067).

280605855453 is a wasteful number, since it uses less digits than its factorization.

280605855453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220337.

The product of its (nonzero) digits is 5760000, while the sum is 51.

The spelling of 280605855453 in words is "two hundred eighty billion, six hundred five million, eight hundred fifty-five thousand, four hundred fifty-three".