155520450541 has 4 divisors (see below), whose sum is σ = 157060257084. Its totient is φ = 153980644000.

The previous prime is 155520450539. The next prime is 155520450571. The reversal of 155520450541 is 145054025551.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 126988173316 + 28532277225 = 356354^2 + 168915^2 .

It is a cyclic number.

It is not a de Polignac number, because 155520450541 - 2¹ = 155520450539 is a prime.

It is a super-2 number, since 2×155520450541² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155520450541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155520450571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 769903120 + ... + 769903321.

It is an arithmetic number, because the mean of its divisors is an integer number (39265064271).

Almost surely, 2^155520450541 is an apocalyptic number.

It is an amenable number.

155520450541 is a deficient number, since it is larger than the sum of its proper divisors (1539806543).

155520450541 is a wasteful number, since it uses less digits than its factorization.

155520450541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1539806542.

The product of its (nonzero) digits is 100000, while the sum is 37.

The spelling of 155520450541 in words is "one hundred fifty-five billion, five hundred twenty million, four hundred fifty thousand, five hundred forty-one".