61693460618 has 4 divisors (see below), whose sum is σ = 92540190930. Its totient is φ = 30846730308.

The previous prime is 61693460603. The next prime is 61693460641. The reversal of 61693460618 is 81606439616.

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

It can be written as a sum of positive squares in only one way, i.e., 47874752809 + 13818707809 = 218803^2 + 117553^2 .

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 as a sum of consecutive naturals, namely, 15423365153 + ... + 15423365156.

Almost surely, 2^61693460618 is an apocalyptic number.

61693460618 is a deficient number, since it is larger than the sum of its proper divisors (30846730312).

61693460618 is a wasteful number, since it uses less digits than its factorization.

61693460618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30846730311.

The product of its (nonzero) digits is 1119744, while the sum is 50.

The spelling of 61693460618 in words is "sixty-one billion, six hundred ninety-three million, four hundred sixty thousand, six hundred eighteen".