87930621745 has 32 divisors (see below), whose sum is σ = 110773648800. Its totient is φ = 66913910784.

The previous prime is 87930621743. The next prime is 87930621763. The reversal of 87930621745 is 54712603978.

It can be written as a sum of positive squares in 16 ways, for example, as 34883779984 + 53046841761 = 186772^2 + 230319^2 .

It is a 5-Lehmer number, since φ(87930621745) divides (87930621745-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 87930621745 - 2¹ = 87930621743 is a prime.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 87930621692 and 87930621701.

It is not an unprimeable number, because it can be changed into a prime (87930621743) 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, 10676149 + ... + 10684381.

It is an arithmetic number, because the mean of its divisors is an integer number (3461676525).

It is a 2-persistent number, because it is pandigital, and so is 2⋅87930621745 = 175861243490, but 3⋅87930621745 = 263791865235 is not.

Almost surely, 2^87930621745 is an apocalyptic number.

It is an amenable number.

87930621745 is a deficient number, since it is larger than the sum of its proper divisors (22843027055).

87930621745 is a wasteful number, since it uses less digits than its factorization.

87930621745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9349.

The product of its (nonzero) digits is 2540160, while the sum is 52.

The spelling of 87930621745 in words is "eighty-seven billion, nine hundred thirty million, six hundred twenty-one thousand, seven hundred forty-five".