155205220364552 has 32 divisors (see below), whose sum is σ = 291077908392600. Its totient is φ = 77584445858304.

The previous prime is 155205220364489. The next prime is 155205220364603. The reversal of 155205220364552 is 255463022502551.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 85609015320196 + 69596205044356 = 9252514^2 + 8342434^2 .

It is a junction number, because it is equal to n+sod(n) for n = 155205220364497 and 155205220364506.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1981717298 + ... + 1981795614.

Almost surely, 2^{155205220364552} is an apocalyptic number.

It is an amenable number.

155205220364552 is a deficient number, since it is larger than the sum of its proper divisors (135872688028048).

155205220364552 is a wasteful number, since it uses less digits than its factorization.

155205220364552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133145 (or 133141 counting only the distinct ones).

The product of its (nonzero) digits is 3600000, while the sum is 47.

The spelling of 155205220364552 in words is "one hundred fifty-five trillion, two hundred five billion, two hundred twenty million, three hundred sixty-four thousand, five hundred fifty-two".