61908857741 has 16 divisors (see below), whose sum is σ = 65026934784. Its totient is φ = 58826751984.

The previous prime is 61908857723. The next prime is 61908857749. The reversal of 61908857741 is 14775880916.

It is a happy number.

61908857741 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61908857741 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 (61908857749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8012306 + ... + 8020028.

It is an arithmetic number, because the mean of its divisors is an integer number (4064183424).

Almost surely, 2^61908857741 is an apocalyptic number.

It is an amenable number.

61908857741 is a deficient number, since it is larger than the sum of its proper divisors (3118077043).

61908857741 is a wasteful number, since it uses less digits than its factorization.

61908857741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10000.

The product of its (nonzero) digits is 3386880, while the sum is 56.

The spelling of 61908857741 in words is "sixty-one billion, nine hundred eight million, eight hundred fifty-seven thousand, seven hundred forty-one".