61564156341 has 4 divisors (see below), whose sum is σ = 82085541792. Its totient is φ = 41042770892.

The previous prime is 61564156333. The next prime is 61564156363. The reversal of 61564156341 is 14365146516.

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 61564156341 - 2³ = 61564156333 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61564156293 and 61564156302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61564156301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10260692721 + ... + 10260692726.

It is an arithmetic number, because the mean of its divisors is an integer number (20521385448).

Almost surely, 2^61564156341 is an apocalyptic number.

It is an amenable number.

61564156341 is a deficient number, since it is larger than the sum of its proper divisors (20521385451).

61564156341 is a wasteful number, since it uses less digits than its factorization.

61564156341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20521385450.

The product of its digits is 259200, while the sum is 42.

The spelling of 61564156341 in words is "sixty-one billion, five hundred sixty-four million, one hundred fifty-six thousand, three hundred forty-one".