155252211540 has 48 divisors (see below), whose sum is σ = 434729537088. Its totient is φ = 41398366464.

The previous prime is 155252211539. The next prime is 155252211553. The reversal of 155252211540 is 45112252551.

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 15 ways as a sum of consecutive naturals, for example, 1270779 + ... + 1387581.

It is an arithmetic number, because the mean of its divisors is an integer number (9056865356).

Almost surely, 2^155252211540 is an apocalyptic number.

155252211540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155252211540 is an abundant number, since it is smaller than the sum of its proper divisors (279477325548).

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

155252211540 is a wasteful number, since it uses less digits than its factorization.

155252211540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138968 (or 138966 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 33.

The spelling of 155252211540 in words is "one hundred fifty-five billion, two hundred fifty-two million, two hundred eleven thousand, five hundred forty".