61742791 has 6 divisors (see below), whose sum is σ = 67866176. Its totient is φ = 56129700.

The previous prime is 61742777. The next prime is 61742809. The reversal of 61742791 is 19724716.

It is not a de Polignac number, because 61742791 - 2⁷ = 61742663 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61742791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61742491) 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, 255015 + ... + 255256.

Almost surely, 2^61742791 is an apocalyptic number.

61742791 is a deficient number, since it is larger than the sum of its proper divisors (6123385).

61742791 is a wasteful number, since it uses less digits than its factorization.

61742791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510293 (or 510282 counting only the distinct ones).

The product of its digits is 21168, while the sum is 37.

The square root of 61742791 is about 7857.6581116768. The cubic root of 61742791 is about 395.2410876674.

The spelling of 61742791 in words is "sixty-one million, seven hundred forty-two thousand, seven hundred ninety-one".