28158634761 has 8 divisors (see below), whose sum is σ = 37549673280. Its totient is φ = 18770009712.

The previous prime is 28158634739. The next prime is 28158634769. The reversal of 28158634761 is 16743685182.

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

It is not a de Polignac number, because 28158634761 - 2¹⁵ = 28158601993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28158634769) 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, 575965 + ... + 622938.

It is an arithmetic number, because the mean of its divisors is an integer number (4693709160).

Almost surely, 2^28158634761 is an apocalyptic number.

It is an amenable number.

28158634761 is a deficient number, since it is larger than the sum of its proper divisors (9391038519).

28158634761 is a wasteful number, since it uses less digits than its factorization.

28158634761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206735.

The product of its digits is 1935360, while the sum is 51.

The spelling of 28158634761 in words is "twenty-eight billion, one hundred fifty-eight million, six hundred thirty-four thousand, seven hundred sixty-one".