3487206347561 has 4 divisors (see below), whose sum is σ = 3487230946500. Its totient is φ = 3487181748624.

The previous prime is 3487206347557. The next prime is 3487206347609. The reversal of 3487206347561 is 1657436027843.

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 1176669545536 + 2310536802025 = 1084744^2 + 1520045^2 .

It is a cyclic number.

It is not a de Polignac number, because 3487206347561 - 2² = 3487206347557 is a prime.

It is a super-2 number, since 2×3487206347561² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3487206347497 and 3487206347506.

It is not an unprimeable number, because it can be changed into a prime (3487206347501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12085586 + ... + 12370763.

It is an arithmetic number, because the mean of its divisors is an integer number (871807736625).

Almost surely, 2^{3487206347561} is an apocalyptic number.

It is an amenable number.

3487206347561 is a deficient number, since it is larger than the sum of its proper divisors (24598939).

3487206347561 is a wasteful number, since it uses less digits than its factorization.

3487206347561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24598938.

The product of its (nonzero) digits is 20321280, while the sum is 56.

The spelling of 3487206347561 in words is "three trillion, four hundred eighty-seven billion, two hundred six million, three hundred forty-seven thousand, five hundred sixty-one".