155540163213 has 12 divisors (see below), whose sum is σ = 224710563168. Its totient is φ = 103674316680.

The previous prime is 155540163209. The next prime is 155540163221. The reversal of 155540163213 is 312361045551.

155540163213 is a `hidden beast` number, since 1 + 5 + 5 + 5 + 4 + 0 + 1 + 632 + 13 = 666.

It is not a de Polignac number, because 155540163213 - 2² = 155540163209 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155540163223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1542195 + ... + 1639952.

It is an arithmetic number, because the mean of its divisors is an integer number (18725880264).

Almost surely, 2^155540163213 is an apocalyptic number.

It is an amenable number.

155540163213 is a deficient number, since it is larger than the sum of its proper divisors (69170399955).

155540163213 is a wasteful number, since it uses less digits than its factorization.

155540163213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3187584 (or 3187581 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The spelling of 155540163213 in words is "one hundred fifty-five billion, five hundred forty million, one hundred sixty-three thousand, two hundred thirteen".