155771128560 has 40 divisors (see below), whose sum is σ = 482890499280. Its totient is φ = 41538967552.

The previous prime is 155771128559. The next prime is 155771128589. The reversal of 155771128560 is 65821177551.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (48).

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 7 ways as a sum of consecutive naturals, for example, 324522945 + ... + 324523424.

It is an arithmetic number, because the mean of its divisors is an integer number (12072262482).

Almost surely, 2^155771128560 is an apocalyptic number.

155771128560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155771128560 is an abundant number, since it is smaller than the sum of its proper divisors (327119370720).

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

155771128560 is a wasteful number, since it uses less digits than its factorization.

155771128560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649046385 (or 649046379 counting only the distinct ones).

The product of its (nonzero) digits is 588000, while the sum is 48.

The spelling of 155771128560 in words is "one hundred fifty-five billion, seven hundred seventy-one million, one hundred twenty-eight thousand, five hundred sixty".