155405143533320 has 32 divisors (see below), whose sum is σ = 349847860584600. Its totient is φ = 62128939611648.

The previous prime is 155405143533313. The next prime is 155405143533323. The reversal of 155405143533320 is 23335341504551.

It can be written as a sum of positive squares in 4 ways, for example, as 148380512771716 + 7024630761604 = 12181154^2 + 2650402^2 .

It is a super-2 number, since 2×155405143533320² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155405143533323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1034855285 + ... + 1035005444.

Almost surely, 2^{155405143533320} is an apocalyptic number.

155405143533320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155405143533320 is an abundant number, since it is smaller than the sum of its proper divisors (194442717051280).

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

155405143533320 is a wasteful number, since it uses less digits than its factorization.

155405143533320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2069862617 (or 2069862613 counting only the distinct ones).

The product of its (nonzero) digits is 1620000, while the sum is 44.

The spelling of 155405143533320 in words is "one hundred fifty-five trillion, four hundred five billion, one hundred forty-three million, five hundred thirty-three thousand, three hundred twenty".