87475506145 has 4 divisors (see below), whose sum is σ = 104970607380. Its totient is φ = 69980404912.

The previous prime is 87475506137. The next prime is 87475506169. The reversal of 87475506145 is 54160557478.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31766289361 + 55709216784 = 178231^2 + 236028^2 .

It is a cyclic number.

It is not a de Polignac number, because 87475506145 - 2³ = 87475506137 is a prime.

It is a super-2 number, since 2×87475506145² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 87475506092 and 87475506101.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8747550610 + ... + 8747550619.

It is an arithmetic number, because the mean of its divisors is an integer number (26242651845).

Almost surely, 2^87475506145 is an apocalyptic number.

It is an amenable number.

87475506145 is a deficient number, since it is larger than the sum of its proper divisors (17495101235).

87475506145 is a wasteful number, since it uses less digits than its factorization.

87475506145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17495101234.

The product of its (nonzero) digits is 4704000, while the sum is 52.

The spelling of 87475506145 in words is "eighty-seven billion, four hundred seventy-five million, five hundred six thousand, one hundred forty-five".