1155212156064 has 48 divisors (see below), whose sum is σ = 3032488005120. Its totient is φ = 385063595520.

The previous prime is 1155212156051. The next prime is 1155212156069. The reversal of 1155212156064 is 4606512125511.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (1155212156069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8812924 + ... + 8943044.

It is an arithmetic number, because the mean of its divisors is an integer number (63176833440).

Almost surely, 2^{1155212156064} is an apocalyptic number.

It is an amenable number.

1155212156064 is an abundant number, since it is smaller than the sum of its proper divisors (1877275849056).

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

1155212156064 is a wasteful number, since it uses less digits than its factorization.

1155212156064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222613 (or 222605 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 39.

The spelling of 1155212156064 in words is "one trillion, one hundred fifty-five billion, two hundred twelve million, one hundred fifty-six thousand, sixty-four".