155573565680 has 40 divisors (see below), whose sum is σ = 389532276672. Its totient is φ = 57442546944.

The previous prime is 155573565673. The next prime is 155573565713. The reversal of 155573565680 is 86565375551.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74793944 + ... + 74796023.

Almost surely, 2^155573565680 is an apocalyptic number.

155573565680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155573565680 is an abundant number, since it is smaller than the sum of its proper divisors (233958710992).

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

155573565680 is a wasteful number, since it uses less digits than its factorization.

155573565680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149589993 (or 149589987 counting only the distinct ones).

The product of its (nonzero) digits is 18900000, while the sum is 56.

The spelling of 155573565680 in words is "one hundred fifty-five billion, five hundred seventy-three million, five hundred sixty-five thousand, six hundred eighty".