155780725144 has 32 divisors (see below), whose sum is σ = 321462257040. Its totient is φ = 70182784000.

The previous prime is 155780725091. The next prime is 155780725151. The reversal of 155780725144 is 441527087551.

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, 7822957 + ... + 7842844.

Almost surely, 2^155780725144 is an apocalyptic number.

It is an amenable number.

155780725144 is an abundant number, since it is smaller than the sum of its proper divisors (165681531896).

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

155780725144 is a wasteful number, since it uses less digits than its factorization.

155780725144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15665931 (or 15665927 counting only the distinct ones).

The product of its (nonzero) digits is 1568000, while the sum is 49.

The spelling of 155780725144 in words is "one hundred fifty-five billion, seven hundred eighty million, seven hundred twenty-five thousand, one hundred forty-four".