7884127612561 has 4 divisors (see below), whose sum is σ = 7885991036224. Its totient is φ = 7882264188900.

The previous prime is 7884127612519. The next prime is 7884127612567. The reversal of 7884127612561 is 1652167214887.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7884127612561 - 2⁷ = 7884127612433 is a prime.

It is a super-2 number, since 2×7884127612561² (a number of 27 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 = 7884127612496 and 7884127612505.

It is not an unprimeable number, because it can be changed into a prime (7884127612567) 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, 931705485 + ... + 931713946.

It is an arithmetic number, because the mean of its divisors is an integer number (1971497759056).

Almost surely, 2^{7884127612561} is an apocalyptic number.

It is an amenable number.

7884127612561 is a deficient number, since it is larger than the sum of its proper divisors (1863423663).

7884127612561 is a wasteful number, since it uses less digits than its factorization.

7884127612561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1863423662.

The product of its digits is 9031680, while the sum is 58.

The spelling of 7884127612561 in words is "seven trillion, eight hundred eighty-four billion, one hundred twenty-seven million, six hundred twelve thousand, five hundred sixty-one".