61771458 has 48 divisors (see below), whose sum is σ = 144707040. Its totient is φ = 17527104.

The previous prime is 61771427. The next prime is 61771459. The reversal of 61771458 is 85417716.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61771459) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47278 + ... + 48566.

It is an arithmetic number, because the mean of its divisors is an integer number (3014730).

Almost surely, 2^61771458 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61771458, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72353520).

61771458 is an abundant number, since it is smaller than the sum of its proper divisors (82935582).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61771458 is a wasteful number, since it uses less digits than its factorization.

61771458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1471 (or 1464 counting only the distinct ones).

The product of its digits is 47040, while the sum is 39.

The square root of 61771458 is about 7859.4820440026. The cubic root of 61771458 is about 395.3022479690.

The spelling of 61771458 in words is "sixty-one million, seven hundred seventy-one thousand, four hundred fifty-eight".