87406563021 has 8 divisors (see below), whose sum is σ = 116545188864. Its totient is φ = 58269489600.

The previous prime is 87406563011. The next prime is 87406563103. The reversal of 87406563021 is 12036560478.

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

It is not a de Polignac number, because 87406563021 - 2¹⁴ = 87406546637 is a prime.

It is a super-3 number, since 3×87406563021³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87406563011) 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, 249676 + ... + 486981.

It is an arithmetic number, because the mean of its divisors is an integer number (14568148608).

Almost surely, 2^87406563021 is an apocalyptic number.

It is an amenable number.

87406563021 is a deficient number, since it is larger than the sum of its proper divisors (29138625843).

87406563021 is a wasteful number, since it uses less digits than its factorization.

87406563021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776211.

The product of its (nonzero) digits is 241920, while the sum is 42.

The spelling of 87406563021 in words is "eighty-seven billion, four hundred six million, five hundred sixty-three thousand, twenty-one".