155143502000 has 80 divisors (see below), whose sum is σ = 375394500000. Its totient is φ = 62014803200.

The previous prime is 155143501957. The next prime is 155143502009. The reversal of 155143502000 is 205341551.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (155143502009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2972126 + ... + 3023874.

It is an arithmetic number, because the mean of its divisors is an integer number (4692431250).

Almost surely, 2^155143502000 is an apocalyptic number.

155143502000 is a gapful number since it is divisible by the number (10) 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 155143502000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187697250000).

155143502000 is an abundant number, since it is smaller than the sum of its proper divisors (220250998000).

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

155143502000 is a wasteful number, since it uses less digits than its factorization.

155143502000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53271 (or 53255 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

Adding to 155143502000 its reverse (205341551), we get a palindrome (155348843551).

The spelling of 155143502000 in words is "one hundred fifty-five billion, one hundred forty-three million, five hundred two thousand".