61757610261 has 16 divisors (see below), whose sum is σ = 82630094400. Its totient is φ = 41028664320.

The previous prime is 61757610227. The next prime is 61757610269. The reversal of 61757610261 is 16201675716.

It is a de Polignac number, because none of the positive numbers 2^k-61757610261 is a prime.

It is a super-4 number, since 4×61757610261⁴ (a number of 44 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61757610269) 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, 1064151 + ... + 1120683.

It is an arithmetic number, because the mean of its divisors is an integer number (5164380900).

Almost surely, 2^61757610261 is an apocalyptic number.

It is an amenable number.

61757610261 is a deficient number, since it is larger than the sum of its proper divisors (20872484139).

61757610261 is a wasteful number, since it uses less digits than its factorization.

61757610261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57796.

The product of its (nonzero) digits is 105840, while the sum is 42.

The spelling of 61757610261 in words is "sixty-one billion, seven hundred fifty-seven million, six hundred ten thousand, two hundred sixty-one".