87945637381 has 8 divisors (see below), whose sum is σ = 101638618560. Its totient is φ = 74534985888.

The previous prime is 87945637363. The next prime is 87945637391. The reversal of 87945637381 is 18373654978.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87945637381 - 2²¹ = 87943540229 is a prime.

It is a super-2 number, since 2×87945637381² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87945637321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70581751 + ... + 70582996.

It is an arithmetic number, because the mean of its divisors is an integer number (12704827320).

Almost surely, 2^87945637381 is an apocalyptic number.

It is an amenable number.

87945637381 is a deficient number, since it is larger than the sum of its proper divisors (13692981179).

87945637381 is a wasteful number, since it uses less digits than its factorization.

87945637381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141164843.

The product of its digits is 30481920, while the sum is 61.

The spelling of 87945637381 in words is "eighty-seven billion, nine hundred forty-five million, six hundred thirty-seven thousand, three hundred eighty-one".