155317773312 has 792 divisors, whose sum is σ = 532722415680. Its totient is φ = 43197235200.

The previous prime is 155317773263. The next prime is 155317773361. The reversal of 155317773312 is 213377713551.

155317773312 is a `hidden beast` number, since 1 + 5 + 531 + 7 + 77 + 33 + 12 = 666.

It is an interprime number because it is at equal distance from previous prime (155317773263) and next prime (155317773361).

It is a super-2 number, since 2×155317773312² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2187574237 + ... + 2187574307.

Almost surely, 2^155317773312 is an apocalyptic number.

155317773312 is a gapful number since it is divisible by the number (12) 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 155317773312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266361207840).

155317773312 is an abundant number, since it is smaller than the sum of its proper divisors (377404642368).

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

155317773312 is a wasteful number, since it uses less digits than its factorization.

155317773312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191 (or 139 counting only the distinct ones).

The product of its digits is 463050, while the sum is 45.

The spelling of 155317773312 in words is "one hundred fifty-five billion, three hundred seventeen million, seven hundred seventy-three thousand, three hundred twelve".