28618749453 has 8 divisors (see below), whose sum is σ = 43609523008. Its totient is φ = 16353571104.

The previous prime is 28618749451. The next prime is 28618749517. The reversal of 28618749453 is 35494781682.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28618749453 - 2¹ = 28618749451 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28618749393 and 28618749402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28618749451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 681398776 + ... + 681398817.

It is an arithmetic number, because the mean of its divisors is an integer number (5451190376).

Almost surely, 2^28618749453 is an apocalyptic number.

It is an amenable number.

28618749453 is a deficient number, since it is larger than the sum of its proper divisors (14990773555).

28618749453 is a wasteful number, since it uses less digits than its factorization.

28618749453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362797603.

The product of its digits is 11612160, while the sum is 57.

The spelling of 28618749453 in words is "twenty-eight billion, six hundred eighteen million, seven hundred forty-nine thousand, four hundred fifty-three".