155028009864 has 384 divisors, whose sum is σ = 508168442880. Its totient is φ = 39016857600.

The previous prime is 155028009863. The next prime is 155028009869. The reversal of 155028009864 is 468900820551.

It is not an unprimeable number, because it can be changed into a prime (155028009863) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 34594504 + ... + 34598984.

It is an arithmetic number, because the mean of its divisors is an integer number (1323355320).

Almost surely, 2^155028009864 is an apocalyptic number.

155028009864 is a gapful number since it is divisible by the number (14) 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 155028009864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254084221440).

155028009864 is an abundant number, since it is smaller than the sum of its proper divisors (353140433016).

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

155028009864 is a wasteful number, since it uses less digits than its factorization.

155028009864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4621 (or 4610 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 48.

The spelling of 155028009864 in words is "one hundred fifty-five billion, twenty-eight million, nine thousand, eight hundred sixty-four".