61564996465 has 8 divisors (see below), whose sum is σ = 84431995200. Its totient is φ = 42215997552.

The previous prime is 61564996463. The next prime is 61564996483. The reversal of 61564996465 is 56469946516.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61564996465 - 2¹ = 61564996463 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61564996463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 879499915 + ... + 879499984.

It is an arithmetic number, because the mean of its divisors is an integer number (10553999400).

Almost surely, 2^61564996465 is an apocalyptic number.

It is an amenable number.

61564996465 is a deficient number, since it is larger than the sum of its proper divisors (22866998735).

61564996465 is a wasteful number, since it uses less digits than its factorization.

61564996465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1758999911.

The product of its digits is 41990400, while the sum is 61.

The spelling of 61564996465 in words is "sixty-one billion, five hundred sixty-four million, nine hundred ninety-six thousand, four hundred sixty-five".