61657205271659 has 4 divisors (see below), whose sum is σ = 61658397619416. Its totient is φ = 61656012923904.

The previous prime is 61657205271653. The next prime is 61657205271721. The reversal of 61657205271659 is 95617250275616.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61657205271659 - 2¹² = 61657205267563 is a prime.

It is a super-2 number, since 2×61657205271659² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61657205271653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 596096309 + ... + 596199734.

It is an arithmetic number, because the mean of its divisors is an integer number (15414599404854).

Almost surely, 2^{61657205271659} is an apocalyptic number.

61657205271659 is a deficient number, since it is larger than the sum of its proper divisors (1192347757).

61657205271659 is a wasteful number, since it uses less digits than its factorization.

61657205271659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192347756.

The product of its (nonzero) digits is 47628000, while the sum is 62.

The spelling of 61657205271659 in words is "sixty-one trillion, six hundred fifty-seven billion, two hundred five million, two hundred seventy-one thousand, six hundred fifty-nine".