155143023433340 has 96 divisors (see below), whose sum is σ = 337881382884864. Its totient is φ = 59774961991680.

The previous prime is 155143023433261. The next prime is 155143023433361. The reversal of 155143023433340 is 43334320341551.

It is a super-2 number, since 2×155143023433340² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 383628122 + ... + 384032318.

It is an arithmetic number, because the mean of its divisors is an integer number (3519597738384).

Almost surely, 2^{155143023433340} is an apocalyptic number.

155143023433340 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 155143023433340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168940691442432).

155143023433340 is an abundant number, since it is smaller than the sum of its proper divisors (182738359451524).

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

155143023433340 is a wasteful number, since it uses less digits than its factorization.

155143023433340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407127 (or 407125 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 41.

Adding to 155143023433340 its reverse (43334320341551), we get a palindrome (198477343774891).

The spelling of 155143023433340 in words is "one hundred fifty-five trillion, one hundred forty-three billion, twenty-three million, four hundred thirty-three thousand, three hundred forty".