155374144550 has 24 divisors (see below), whose sum is σ = 289007356512. Its totient is φ = 62147196000.

The previous prime is 155374144531. The next prime is 155374144559. The reversal of 155374144550 is 55441473551.

It is a happy number.

It is a super-2 number, since 2×155374144550² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155374144559) 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, 1729235 + ... + 1816865.

It is an arithmetic number, because the mean of its divisors is an integer number (12041973188).

Almost surely, 2^155374144550 is an apocalyptic number.

155374144550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155374144550 is a deficient number, since it is larger than the sum of its proper divisors (133633211962).

155374144550 is a wasteful number, since it uses less digits than its factorization.

155374144550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123104 (or 123099 counting only the distinct ones).

The product of its (nonzero) digits is 840000, while the sum is 44.

The spelling of 155374144550 in words is "one hundred fifty-five billion, three hundred seventy-four million, one hundred forty-four thousand, five hundred fifty".