87120140640 has 192 divisors, whose sum is σ = 311093395200. Its totient is φ = 20316248064.

The previous prime is 87120140633. The next prime is 87120140641. The reversal of 87120140640 is 4604102178.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87120140641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 248850 + ... + 485969.

It is an arithmetic number, because the mean of its divisors is an integer number (1620278100).

Almost surely, 2^87120140640 is an apocalyptic number.

87120140640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

87120140640 is an abundant number, since it is smaller than the sum of its proper divisors (223973254560).

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

87120140640 is a wasteful number, since it uses less digits than its factorization.

87120140640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734869 (or 734861 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The spelling of 87120140640 in words is "eighty-seven billion, one hundred twenty million, one hundred forty thousand, six hundred forty".