87081557070 has 64 divisors (see below), whose sum is σ = 214119189504. Its totient is φ = 22653805440.

The previous prime is 87081557063. The next prime is 87081557071. The reversal of 87081557070 is 7075518078.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87081557071) 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, 1017979 + ... + 1100201.

It is an arithmetic number, because the mean of its divisors is an integer number (3345612336).

Almost surely, 2^87081557070 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87081557070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107059594752).

87081557070 is an abundant number, since it is smaller than the sum of its proper divisors (127037632434).

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

87081557070 is a wasteful number, since it uses less digits than its factorization.

87081557070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83097.

The product of its (nonzero) digits is 548800, while the sum is 48.

The spelling of 87081557070 in words is "eighty-seven billion, eighty-one million, five hundred fifty-seven thousand, seventy".