117688447451 has 2 divisors, whose sum is σ = 117688447452. Its totient is φ = 117688447450.

The previous prime is 117688447427. The next prime is 117688447463. The reversal of 117688447451 is 154744886711.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (154744886711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117688447451 - 2²⁶ = 117621338587 is a prime.

It is not a weakly prime, because it can be changed into another prime (117688447351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58844223725 + 58844223726.

It is an arithmetic number, because the mean of its divisors is an integer number (58844223726).

Almost surely, 2^117688447451 is an apocalyptic number.

117688447451 is a deficient number, since it is larger than the sum of its proper divisors (1).

117688447451 is an equidigital number, since it uses as much as digits as its factorization.

117688447451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6021120, while the sum is 56.

The spelling of 117688447451 in words is "one hundred seventeen billion, six hundred eighty-eight million, four hundred forty-seven thousand, four hundred fifty-one".