1212065157888 has 576 divisors, whose sum is σ = 4228151356800. Its totient is φ = 338889277440.

The previous prime is 1212065157883. The next prime is 1212065157913. The reversal of 1212065157888 is 8887515602121.

It is a happy number.

1212065157888 is a `hidden beast` number, since 1 + 2 + 1 + 2 + 0 + 65 + 1 + 578 + 8 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1212065157883) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 44285328 + ... + 44312688.

It is an arithmetic number, because the mean of its divisors is an integer number (7340540550).

Almost surely, 2^{1212065157888} is an apocalyptic number.

1212065157888 is a gapful number since it is divisible by the number (18) 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 1212065157888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2114075678400).

1212065157888 is an abundant number, since it is smaller than the sum of its proper divisors (3016086198912).

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

1212065157888 is a wasteful number, since it uses less digits than its factorization.

1212065157888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27445 (or 27425 counting only the distinct ones).

The product of its (nonzero) digits is 2150400, while the sum is 54.

The spelling of 1212065157888 in words is "one trillion, two hundred twelve billion, sixty-five million, one hundred fifty-seven thousand, eight hundred eighty-eight".