61634564086 has 4 divisors (see below), whose sum is σ = 92451846132. Its totient is φ = 30817282042.

The previous prime is 61634564051. The next prime is 61634564087. The reversal of 61634564086 is 68046543616.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61634564087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15408641020 + ... + 15408641023.

It is an arithmetic number, because the mean of its divisors is an integer number (23112961533).

Almost surely, 2^61634564086 is an apocalyptic number.

61634564086 is a deficient number, since it is larger than the sum of its proper divisors (30817282046).

61634564086 is a wasteful number, since it uses less digits than its factorization.

61634564086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30817282045.

The product of its (nonzero) digits is 2488320, while the sum is 49.

The spelling of 61634564086 in words is "sixty-one billion, six hundred thirty-four million, five hundred sixty-four thousand, eighty-six".