155109945511 has 2 divisors, whose sum is σ = 155109945512. Its totient is φ = 155109945510.

The previous prime is 155109945481. The next prime is 155109945527. The reversal of 155109945511 is 115549901551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155109945511 - 2⁹ = 155109944999 is a prime.

It is a super-2 number, since 2×155109945511² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155109945541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77554972755 + 77554972756.

It is an arithmetic number, because the mean of its divisors is an integer number (77554972756).

Almost surely, 2^155109945511 is an apocalyptic number.

155109945511 is a deficient number, since it is larger than the sum of its proper divisors (1).

155109945511 is an equidigital number, since it uses as much as digits as its factorization.

155109945511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 202500, while the sum is 46.

The spelling of 155109945511 in words is "one hundred fifty-five billion, one hundred nine million, nine hundred forty-five thousand, five hundred eleven".