247993378151 has 4 divisors (see below), whose sum is σ = 251486242704. Its totient is φ = 244500513600.

The previous prime is 247993378097. The next prime is 247993378187. The reversal of 247993378151 is 151873399742.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 247993378151 - 2²⁶ = 247926269287 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 (247993371151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1746432170 + ... + 1746432311.

It is an arithmetic number, because the mean of its divisors is an integer number (62871560676).

Almost surely, 2^247993378151 is an apocalyptic number.

247993378151 is a deficient number, since it is larger than the sum of its proper divisors (3492864553).

247993378151 is an equidigital number, since it uses as much as digits as its factorization.

247993378151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3492864552.

The product of its digits is 11430720, while the sum is 59.

The spelling of 247993378151 in words is "two hundred forty-seven billion, nine hundred ninety-three million, three hundred seventy-eight thousand, one hundred fifty-one".