450921861531 has 12 divisors (see below), whose sum is σ = 672342274240. Its totient is φ = 290917329840.

The previous prime is 450921861493. The next prime is 450921861547. The reversal of 450921861531 is 135168129054.

It is a happy number.

450921861531 is a `hidden beast` number, since 4 + 5 + 0 + 9 + 21 + 8 + 615 + 3 + 1 = 666.

It is not a de Polignac number, because 450921861531 - 2¹³ = 450921853339 is a prime.

It is a super-2 number, since 2×450921861531² (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 (450921861581) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 808103416 + ... + 808103973.

Almost surely, 2^450921861531 is an apocalyptic number.

450921861531 is a deficient number, since it is larger than the sum of its proper divisors (221420412709).

450921861531 is a wasteful number, since it uses less digits than its factorization.

450921861531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1616207426 (or 1616207423 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The spelling of 450921861531 in words is "four hundred fifty billion, nine hundred twenty-one million, eight hundred sixty-one thousand, five hundred thirty-one".