155188649616 has 960 divisors, whose sum is σ = 594321960960. Its totient is φ = 33630474240.

The previous prime is 155188649569. The next prime is 155188649729. The reversal of 155188649616 is 616946881551.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 155188649616.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 398942350 + ... + 398942738.

It is an arithmetic number, because the mean of its divisors is an integer number (619085376).

Almost surely, 2^155188649616 is an apocalyptic number.

155188649616 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 155188649616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297160980480).

155188649616 is an abundant number, since it is smaller than the sum of its proper divisors (439133311344).

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

155188649616 is a wasteful number, since it uses less digits than its factorization.

155188649616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492 (or 467 counting only the distinct ones).

The product of its digits is 12441600, while the sum is 60.

The spelling of 155188649616 in words is "one hundred fifty-five billion, one hundred eighty-eight million, six hundred forty-nine thousand, six hundred sixteen".