61691085353 has 8 divisors (see below), whose sum is σ = 62656238376. Its totient is φ = 60729177600.

The previous prime is 61691085331. The next prime is 61691085361. The reversal of 61691085353 is 35358019616.

It can be written as a sum of positive squares in 4 ways, for example, as 2137027984 + 59554057369 = 46228^2 + 244037^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 61691085353 - 2²⁶ = 61623976489 is a prime.

It is a super-2 number, since 2×61691085353² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61691085298 and 61691085307.

It is not an unprimeable number, because it can be changed into a prime (61691085373) 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, 772988 + ... + 849053.

It is an arithmetic number, because the mean of its divisors is an integer number (7832029797).

Almost surely, 2^61691085353 is an apocalyptic number.

It is an amenable number.

61691085353 is a deficient number, since it is larger than the sum of its proper divisors (965153023).

61691085353 is a wasteful number, since it uses less digits than its factorization.

61691085353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1622635.

The product of its (nonzero) digits is 583200, while the sum is 47.

The spelling of 61691085353 in words is "sixty-one billion, six hundred ninety-one million, eighty-five thousand, three hundred fifty-three".