155015661552 has 20 divisors (see below), whose sum is σ = 400457125800. Its totient is φ = 51671887168.

The previous prime is 155015661547. The next prime is 155015661571. The reversal of 155015661552 is 255166510551.

155015661552 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×155015661552² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1614746427 + ... + 1614746522.

It is an arithmetic number, because the mean of its divisors is an integer number (20022856290).

Almost surely, 2^155015661552 is an apocalyptic number.

155015661552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

155015661552 is an abundant number, since it is smaller than the sum of its proper divisors (245441464248).

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

155015661552 is a wasteful number, since it uses less digits than its factorization.

155015661552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3229492960 (or 3229492954 counting only the distinct ones).

The product of its (nonzero) digits is 225000, while the sum is 42.

The spelling of 155015661552 in words is "one hundred fifty-five billion, fifteen million, six hundred sixty-one thousand, five hundred fifty-two".