155738978016 has 192 divisors, whose sum is σ = 423652965120. Its totient is φ = 50056704000.

The previous prime is 155738977993. The next prime is 155738978027. The reversal of 155738978016 is 610879837551.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 273706180 + ... + 273706748.

It is an arithmetic number, because the mean of its divisors is an integer number (2206525860).

Almost surely, 2^155738978016 is an apocalyptic number.

155738978016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155738978016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211826482560).

155738978016 is an abundant number, since it is smaller than the sum of its proper divisors (267913987104).

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

155738978016 is a wasteful number, since it uses less digits than its factorization.

155738978016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177 (or 1169 counting only the distinct ones).

The product of its (nonzero) digits is 12700800, while the sum is 60.

The spelling of 155738978016 in words is "one hundred fifty-five billion, seven hundred thirty-eight million, nine hundred seventy-eight thousand, sixteen".