155033501551220 has 48 divisors (see below), whose sum is σ = 344202166358400. Its totient is φ = 58492989198720.

The previous prime is 155033501551211. The next prime is 155033501551223. The reversal of 155033501551220 is 22155105330551.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155033501551223) 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 15 ways as a sum of consecutive naturals, for example, 890705336 + ... + 890879375.

It is an arithmetic number, because the mean of its divisors is an integer number (7170878465800).

Almost surely, 2^{155033501551220} is an apocalyptic number.

155033501551220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155033501551220 is an abundant number, since it is smaller than the sum of its proper divisors (189168664807180).

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

155033501551220 is a wasteful number, since it uses less digits than its factorization.

155033501551220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1781584968 (or 1781584966 counting only the distinct ones).

The product of its (nonzero) digits is 112500, while the sum is 38.

Adding to 155033501551220 its reverse (22155105330551), we get a palindrome (177188606881771).

The spelling of 155033501551220 in words is "one hundred fifty-five trillion, thirty-three billion, five hundred one million, five hundred fifty-one thousand, two hundred twenty".