28001481702291 has 12 divisors (see below), whose sum is σ = 40506683626968. Its totient is φ = 18639916493184.

The previous prime is 28001481702263. The next prime is 28001481702329. The reversal of 28001481702291 is 19220718410082.

28001481702291 is a `hidden beast` number, since 2 + 80 + 0 + 1 + 481 + 7 + 0 + 2 + 2 + 91 = 666.

It is not a de Polignac number, because 28001481702291 - 2¹⁹ = 28001481178003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28001481702221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2311491525 + ... + 2311503638.

It is an arithmetic number, because the mean of its divisors is an integer number (3375556968914).

Almost surely, 2^{28001481702291} is an apocalyptic number.

28001481702291 is a deficient number, since it is larger than the sum of its proper divisors (12505201924677).

28001481702291 is a wasteful number, since it uses less digits than its factorization.

28001481702291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4622995842 (or 4622995839 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The spelling of 28001481702291 in words is "twenty-eight trillion, one billion, four hundred eighty-one million, seven hundred two thousand, two hundred ninety-one".