61564140122 has 16 divisors (see below), whose sum is σ = 92647888872. Its totient is φ = 30681607680.

The previous prime is 61564140109. The next prime is 61564140133. The reversal of 61564140122 is 22104146516.

It can be written as a sum of positive squares in 4 ways, for example, as 43894021081 + 17670119041 = 209509^2 + 132929^2 .

It is a super-2 number, since 2×61564140122² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1302422 + ... + 1348862.

Almost surely, 2^61564140122 is an apocalyptic number.

61564140122 is a deficient number, since it is larger than the sum of its proper divisors (31083748750).

61564140122 is a wasteful number, since it uses less digits than its factorization.

61564140122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48593.

The product of its (nonzero) digits is 11520, while the sum is 32.

Adding to 61564140122 its reverse (22104146516), we get a palindrome (83668286638).

The spelling of 61564140122 in words is "sixty-one billion, five hundred sixty-four million, one hundred forty thousand, one hundred twenty-two".