155435351220 has 96 divisors (see below), whose sum is σ = 485415786240. Its totient is φ = 41291786880.

The previous prime is 155435351219. The next prime is 155435351231. The reversal of 155435351220 is 22153534551.

155435351220 is a `hidden beast` number, since 1 + 5 + 54 + 35 + 351 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 405211 + ... + 689250.

It is an arithmetic number, because the mean of its divisors is an integer number (5056414440).

Almost surely, 2^155435351220 is an apocalyptic number.

155435351220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155435351220 is an abundant number, since it is smaller than the sum of its proper divisors (329980435020).

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

155435351220 is a wasteful number, since it uses less digits than its factorization.

155435351220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094742 (or 1094734 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

Adding to 155435351220 its reverse (22153534551), we get a palindrome (177588885771).

The spelling of 155435351220 in words is "one hundred fifty-five billion, four hundred thirty-five million, three hundred fifty-one thousand, two hundred twenty".