61738791 has 8 divisors (see below), whose sum is σ = 82612464. Its totient is φ = 41012160.

The previous prime is 61738783. The next prime is 61738813. The reversal of 61738791 is 19783716.

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

It is not a de Polignac number, because 61738791 - 2³ = 61738783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61738741) 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, 35776 + ... + 37461.

It is an arithmetic number, because the mean of its divisors is an integer number (10326558).

Almost surely, 2^61738791 is an apocalyptic number.

61738791 is a deficient number, since it is larger than the sum of its proper divisors (20873673).

61738791 is a wasteful number, since it uses less digits than its factorization.

61738791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73521.

The product of its digits is 63504, while the sum is 42.

The square root of 61738791 is about 7857.4035787912. The cubic root of 61738791 is about 395.2325522661.

The spelling of 61738791 in words is "sixty-one million, seven hundred thirty-eight thousand, seven hundred ninety-one".