61219039711 has 4 divisors (see below), whose sum is σ = 64820159712. Its totient is φ = 57617919712.

The previous prime is 61219039697. The next prime is 61219039781. The reversal of 61219039711 is 11793091216.

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

It is a cyclic number.

It is not a de Polignac number, because 61219039711 - 2²¹ = 61216942559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61219039781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1800559975 + ... + 1800560008.

It is an arithmetic number, because the mean of its divisors is an integer number (16205039928).

Almost surely, 2^61219039711 is an apocalyptic number.

61219039711 is a deficient number, since it is larger than the sum of its proper divisors (3601120001).

61219039711 is a wasteful number, since it uses less digits than its factorization.

61219039711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3601120000.

The product of its (nonzero) digits is 20412, while the sum is 40.

The spelling of 61219039711 in words is "sixty-one billion, two hundred nineteen million, thirty-nine thousand, seven hundred eleven".