87742669520 has 40 divisors (see below), whose sum is σ = 222547318560. Its totient is φ = 31906424960.

The previous prime is 87742669519. The next prime is 87742669589. The reversal of 87742669520 is 2596624778.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49852910 + ... + 49854669.

It is an arithmetic number, because the mean of its divisors is an integer number (5563682964).

Almost surely, 2^87742669520 is an apocalyptic number.

87742669520 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

87742669520 is an abundant number, since it is smaller than the sum of its proper divisors (134804649040).

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

87742669520 is a wasteful number, since it uses less digits than its factorization.

87742669520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99707603 (or 99707597 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 56.

The spelling of 87742669520 in words is "eighty-seven billion, seven hundred forty-two million, six hundred sixty-nine thousand, five hundred twenty".