61673994625 has 16 divisors (see below), whose sum is σ = 76976205696. Its totient is φ = 49334670000.

The previous prime is 61673994583. The next prime is 61673994631. The reversal of 61673994625 is 52649937616.

It is not a de Polignac number, because 61673994625 - 2⁹ = 61673994113 is a prime.

It is a super-2 number, since 2×61673994625² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61673994625.

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 15 ways as a sum of consecutive naturals, for example, 2274900 + ... + 2301850.

It is an arithmetic number, because the mean of its divisors is an integer number (4811012856).

Almost surely, 2^61673994625 is an apocalyptic number.

It is an amenable number.

61673994625 is a deficient number, since it is larger than the sum of its proper divisors (15302211071).

61673994625 is a wasteful number, since it uses less digits than its factorization.

61673994625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45273 (or 45263 counting only the distinct ones).

The product of its digits is 14696640, while the sum is 58.

The spelling of 61673994625 in words is "sixty-one billion, six hundred seventy-three million, nine hundred ninety-four thousand, six hundred twenty-five".