155540505412044 has 36 divisors (see below), whose sum is σ = 393344808181416. Its totient is φ = 51824025239808.

The previous prime is 155540505412021. The next prime is 155540505412049. The reversal of 155540505412044 is 440214505045551.

155540505412044 is a `hidden beast` number, since 1 + 5 + 5 + 5 + 40 + 5 + 0 + 541 + 20 + 44 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (155540505412049) 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, 950329434 + ... + 950493089.

It is an arithmetic number, because the mean of its divisors is an integer number (10926244671706).

Almost surely, 2^{155540505412044} is an apocalyptic number.

It is an amenable number.

155540505412044 is an abundant number, since it is smaller than the sum of its proper divisors (237804302769372).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155540505412044 is a wasteful number, since it uses less digits than its factorization.

155540505412044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1900824806 (or 1900824801 counting only the distinct ones).

The product of its (nonzero) digits is 1600000, while the sum is 45.

The spelling of 155540505412044 in words is "one hundred fifty-five trillion, five hundred forty billion, five hundred five million, four hundred twelve thousand, forty-four".