61771534 has 16 divisors (see below), whose sum is σ = 101243520. Its totient is φ = 28032760.

The previous prime is 61771531. The next prime is 61771547. The reversal of 61771534 is 43517716.

It is a self number, because there is not a number n which added to its sum of digits gives 61771534.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61771531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14457 + ... + 18235.

It is an arithmetic number, because the mean of its divisors is an integer number (6327720).

Almost surely, 2^61771534 is an apocalyptic number.

61771534 is a deficient number, since it is larger than the sum of its proper divisors (39471986).

61771534 is a wasteful number, since it uses less digits than its factorization.

61771534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4535.

The product of its digits is 17640, while the sum is 34.

The square root of 61771534 is about 7859.4868789254. The cubic root of 61771534 is about 395.3024100879.

The spelling of 61771534 in words is "sixty-one million, seven hundred seventy-one thousand, five hundred thirty-four".