155228195625840 has 120 divisors (see below), whose sum is σ = 522801743755200. Its totient is φ = 41275577452032.

The previous prime is 155228195625821. The next prime is 155228195625857. The reversal of 155228195625840 is 48526591822551.

155228195625840 is a `hidden beast` number, since 1 + 5 + 5 + 2 + 2 + 8 + 19 + 562 + 58 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 308623672 + ... + 309126231.

It is an arithmetic number, because the mean of its divisors is an integer number (4356681197960).

Almost surely, 2^{155228195625840} is an apocalyptic number.

155228195625840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155228195625840 is an abundant number, since it is smaller than the sum of its proper divisors (367573548129360).

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

155228195625840 is a wasteful number, since it uses less digits than its factorization.

155228195625840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617750271 (or 617750262 counting only the distinct ones).

The product of its (nonzero) digits is 69120000, while the sum is 63.

The spelling of 155228195625840 in words is "one hundred fifty-five trillion, two hundred twenty-eight billion, one hundred ninety-five million, six hundred twenty-five thousand, eight hundred forty".