11553751861081 has 32 divisors (see below), whose sum is σ = 12412187504640. Its totient is φ = 10733272333056.

The previous prime is 11553751861079. The next prime is 11553751861103. The reversal of 11553751861081 is 18016815735511.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11553751861081 - 2¹ = 11553751861079 is a prime.

It is a super-2 number, since 2×11553751861081² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11553751831081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41697111 + ... + 41973283.

It is an arithmetic number, because the mean of its divisors is an integer number (387880859520).

Almost surely, 2^{11553751861081} is an apocalyptic number.

It is an amenable number.

11553751861081 is a deficient number, since it is larger than the sum of its proper divisors (858435643559).

11553751861081 is a wasteful number, since it uses less digits than its factorization.

11553751861081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276673.

The product of its (nonzero) digits is 1008000, while the sum is 52.

The spelling of 11553751861081 in words is "eleven trillion, five hundred fifty-three billion, seven hundred fifty-one million, eight hundred sixty-one thousand, eighty-one".