28451842546 has 4 divisors (see below), whose sum is σ = 42677763822. Its totient is φ = 14225921272.

The previous prime is 28451842519. The next prime is 28451842547. The reversal of 28451842546 is 64524815482.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64524815482 = 2 ⋅32262407741.

It can be written as a sum of positive squares in only one way, i.e., 27270889321 + 1180953225 = 165139^2 + 34365^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28451842546.

It is not an unprimeable number, because it can be changed into a prime (28451842547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7112960635 + ... + 7112960638.

Almost surely, 2^28451842546 is an apocalyptic number.

28451842546 is a deficient number, since it is larger than the sum of its proper divisors (14225921276).

28451842546 is a wasteful number, since it uses less digits than its factorization.

28451842546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14225921275.

The product of its digits is 2457600, while the sum is 49.

The spelling of 28451842546 in words is "twenty-eight billion, four hundred fifty-one million, eight hundred forty-two thousand, five hundred forty-six".