28611731951 has 8 divisors (see below), whose sum is σ = 32855577600. Its totient is φ = 24641682840.

The previous prime is 28611731923. The next prime is 28611731957. The reversal of 28611731951 is 15913711682.

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

It is a cyclic number.

It is not a de Polignac number, because 28611731951 - 2¹⁴ = 28611715567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28611731957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68448911 + ... + 68449328.

It is an arithmetic number, because the mean of its divisors is an integer number (4106947200).

Almost surely, 2^28611731951 is an apocalyptic number.

28611731951 is a deficient number, since it is larger than the sum of its proper divisors (4243845649).

28611731951 is a wasteful number, since it uses less digits than its factorization.

28611731951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136898269.

The product of its digits is 90720, while the sum is 44.

The spelling of 28611731951 in words is "twenty-eight billion, six hundred eleven million, seven hundred thirty-one thousand, nine hundred fifty-one".