74655855247 has 2 divisors, whose sum is σ = 74655855248. Its totient is φ = 74655855246.

The previous prime is 74655855221. The next prime is 74655855257. The reversal of 74655855247 is 74255855647.

It is a strong prime.

It is an emirp because it is prime and its reverse (74255855647) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74655855247 - 2⁷ = 74655855119 is a prime.

It is a super-2 number, since 2×74655855247² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 74655855191 and 74655855200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74655855257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37327927623 + 37327927624.

It is an arithmetic number, because the mean of its divisors is an integer number (37327927624).

Almost surely, 2^74655855247 is an apocalyptic number.

74655855247 is a deficient number, since it is larger than the sum of its proper divisors (1).

74655855247 is an equidigital number, since it uses as much as digits as its factorization.

74655855247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47040000, while the sum is 58.

The spelling of 74655855247 in words is "seventy-four billion, six hundred fifty-five million, eight hundred fifty-five thousand, two hundred forty-seven".