155566045544 has 192 divisors, whose sum is σ = 374796979200. Its totient is φ = 59981644800.

The previous prime is 155566045517. The next prime is 155566045549. The reversal of 155566045544 is 445540665551.

It is a junction number, because it is equal to n+sod(n) for n = 155566045492 and 155566045501.

It is not an unprimeable number, because it can be changed into a prime (155566045549) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 32199209 + ... + 32204039.

It is an arithmetic number, because the mean of its divisors is an integer number (1952067600).

Almost surely, 2^155566045544 is an apocalyptic number.

155566045544 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155566045544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187398489600).

155566045544 is an abundant number, since it is smaller than the sum of its proper divisors (219230933656).

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

155566045544 is a wasteful number, since it uses less digits than its factorization.

155566045544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5024 (or 5013 counting only the distinct ones).

The product of its (nonzero) digits is 7200000, while the sum is 50.

The spelling of 155566045544 in words is "one hundred fifty-five billion, five hundred sixty-six million, forty-five thousand, five hundred forty-four".