9481878151 has 2 divisors, whose sum is σ = 9481878152. Its totient is φ = 9481878150.

The previous prime is 9481878143. The next prime is 9481878227. The reversal of 9481878151 is 1518781849.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9481878151 - 2³ = 9481878143 is a prime.

It is a super-2 number, since 2×9481878151² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9481878551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4740939075 + 4740939076.

It is an arithmetic number, because the mean of its divisors is an integer number (4740939076).

Almost surely, 2^9481878151 is an apocalyptic number.

9481878151 is a deficient number, since it is larger than the sum of its proper divisors (1).

9481878151 is an equidigital number, since it uses as much as digits as its factorization.

9481878151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 645120, while the sum is 52.

The square root of 9481878151 is about 97374.9359486311. The cubic root of 9481878151 is about 2116.5642514965.

The spelling of 9481878151 in words is "nine billion, four hundred eighty-one million, eight hundred seventy-eight thousand, one hundred fifty-one".