87161207760 has 240 divisors, whose sum is σ = 329997003840. Its totient is φ = 21129926400.

The previous prime is 87161207743. The next prime is 87161207827. The reversal of 87161207760 is 6770216178.

It is a tau number, because it is divible by the number of its divisors (240).

It is a super-2 number, since 2×87161207760² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 94615 + ... + 428105.

It is an arithmetic number, because the mean of its divisors is an integer number (1374987516).

Almost surely, 2^87161207760 is an apocalyptic number.

87161207760 is a gapful number since it is divisible by the number (80) 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 87161207760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164998501920).

87161207760 is an abundant number, since it is smaller than the sum of its proper divisors (242835796080).

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

87161207760 is a wasteful number, since it uses less digits than its factorization.

87161207760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333535 (or 333512 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 45.

The spelling of 87161207760 in words is "eighty-seven billion, one hundred sixty-one million, two hundred seven thousand, seven hundred sixty".