155379680447 has 2 divisors, whose sum is σ = 155379680448. Its totient is φ = 155379680446.

The previous prime is 155379680411. The next prime is 155379680453. The reversal of 155379680447 is 744086973551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155379680447 - 2²⁸ = 155111244991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155379686447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77689840223 + 77689840224.

It is an arithmetic number, because the mean of its divisors is an integer number (77689840224).

Almost surely, 2^155379680447 is an apocalyptic number.

155379680447 is a deficient number, since it is larger than the sum of its proper divisors (1).

155379680447 is an equidigital number, since it uses as much as digits as its factorization.

155379680447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25401600, while the sum is 59.

The spelling of 155379680447 in words is "one hundred fifty-five billion, three hundred seventy-nine million, six hundred eighty thousand, four hundred forty-seven".