28148161631 has 8 divisors (see below), whose sum is σ = 28467831600. Its totient is φ = 27828567360.

The previous prime is 28148161583. The next prime is 28148161649. The reversal of 28148161631 is 13616184182.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28148161631 is a prime.

It is a super-2 number, since 2×28148161631² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28148161331) 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, 1103540 + ... + 1128758.

It is an arithmetic number, because the mean of its divisors is an integer number (3558478950).

Almost surely, 2^28148161631 is an apocalyptic number.

28148161631 is a deficient number, since it is larger than the sum of its proper divisors (319669969).

28148161631 is a wasteful number, since it uses less digits than its factorization.

28148161631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37849.

The product of its digits is 55296, while the sum is 41.

The spelling of 28148161631 in words is "twenty-eight billion, one hundred forty-eight million, one hundred sixty-one thousand, six hundred thirty-one".