155855701447 has 2 divisors, whose sum is σ = 155855701448. Its totient is φ = 155855701446.

The previous prime is 155855701403. The next prime is 155855701451. The reversal of 155855701447 is 744107558551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155855701447 - 2²³ = 155847312839 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 155855701394 and 155855701403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155855701147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77927850723 + 77927850724.

It is an arithmetic number, because the mean of its divisors is an integer number (77927850724).

Almost surely, 2^155855701447 is an apocalyptic number.

155855701447 is a deficient number, since it is larger than the sum of its proper divisors (1).

155855701447 is an equidigital number, since it uses as much as digits as its factorization.

155855701447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3920000, while the sum is 52.

The spelling of 155855701447 in words is "one hundred fifty-five billion, eight hundred fifty-five million, seven hundred one thousand, four hundred forty-seven".