61911711 has 6 divisors (see below), whose sum is σ = 89428040. Its totient is φ = 41274468.

The previous prime is 61911697. The next prime is 61911721. The reversal of 61911711 is 11711916.

It is not a de Polignac number, because 61911711 - 2⁵ = 61911679 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 (61911721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3439531 + ... + 3439548.

Almost surely, 2^61911711 is an apocalyptic number.

61911711 is a deficient number, since it is larger than the sum of its proper divisors (27516329).

61911711 is a wasteful number, since it uses less digits than its factorization.

61911711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6879085 (or 6879082 counting only the distinct ones).

The product of its digits is 378, while the sum is 27.

The square root of 61911711 is about 7868.3995195974. The cubic root of 61911711 is about 395.6012016711.

The spelling of 61911711 in words is "sixty-one million, nine hundred eleven thousand, seven hundred eleven".