155145877 has 2 divisors, whose sum is σ = 155145878. Its totient is φ = 155145876.

The previous prime is 155145871. The next prime is 155145889. The reversal of 155145877 is 778541551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118069956 + 37075921 = 10866^2 + 6089^2 .

It is an emirp because it is prime and its reverse (778541551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155145877 - 2¹⁵ = 155113109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155145871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77572938 + 77572939.

It is an arithmetic number, because the mean of its divisors is an integer number (77572939).

Almost surely, 2^155145877 is an apocalyptic number.

It is an amenable number.

155145877 is a deficient number, since it is larger than the sum of its proper divisors (1).

155145877 is an equidigital number, since it uses as much as digits as its factorization.

155145877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 196000, while the sum is 43.

The square root of 155145877 is about 12455.7567815047. The cubic root of 155145877 is about 537.3369999343.

The spelling of 155145877 in words is "one hundred fifty-five million, one hundred forty-five thousand, eight hundred seventy-seven".