71887198451 has 2 divisors, whose sum is σ = 71887198452. Its totient is φ = 71887198450.

The previous prime is 71887198433. The next prime is 71887198507. The reversal of 71887198451 is 15489178817.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71887198451 is a prime.

It is a super-2 number, since 2×71887198451² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (71887198351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35943599225 + 35943599226.

It is an arithmetic number, because the mean of its divisors is an integer number (35943599226).

Almost surely, 2^71887198451 is an apocalyptic number.

71887198451 is a deficient number, since it is larger than the sum of its proper divisors (1).

71887198451 is an equidigital number, since it uses as much as digits as its factorization.

71887198451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4515840, while the sum is 59.

The spelling of 71887198451 in words is "seventy-one billion, eight hundred eighty-seven million, one hundred ninety-eight thousand, four hundred fifty-one".