61676190449 has 4 divisors (see below), whose sum is σ = 61717668864. Its totient is φ = 61634712036.

The previous prime is 61676190419. The next prime is 61676190493. The reversal of 61676190449 is 94409167616.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61676190449 is a prime.

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 61676190449.

It is not an unprimeable number, because it can be changed into a prime (61676190419) 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 in 3 ways as a sum of consecutive naturals, for example, 20736977 + ... + 20739950.

It is an arithmetic number, because the mean of its divisors is an integer number (15429417216).

Almost surely, 2^61676190449 is an apocalyptic number.

It is an amenable number.

61676190449 is a deficient number, since it is larger than the sum of its proper divisors (41478415).

61676190449 is a wasteful number, since it uses less digits than its factorization.

61676190449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41478414.

The product of its (nonzero) digits is 1959552, while the sum is 53.

The spelling of 61676190449 in words is "sixty-one billion, six hundred seventy-six million, one hundred ninety thousand, four hundred forty-nine".