61957111 has 8 divisors (see below), whose sum is σ = 63060480. Its totient is φ = 60859128.

The previous prime is 61957073. The next prime is 61957141. The reversal of 61957111 is 11175916.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61957111 - 2⁹ = 61956599 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 (61957141) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 26970 + ... + 29176.

It is an arithmetic number, because the mean of its divisors is an integer number (7882560).

Almost surely, 2^61957111 is an apocalyptic number.

61957111 is a deficient number, since it is larger than the sum of its proper divisors (1103369).

61957111 is a wasteful number, since it uses less digits than its factorization.

61957111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2693.

The product of its digits is 1890, while the sum is 31.

The square root of 61957111 is about 7871.2839486325. The cubic root of 61957111 is about 395.6978764679.

The spelling of 61957111 in words is "sixty-one million, nine hundred fifty-seven thousand, one hundred eleven".