61705770146 has 8 divisors (see below), whose sum is σ = 92568733740. Its totient is φ = 30849525568.

The previous prime is 61705770143. The next prime is 61705770163. The reversal of 61705770146 is 64107750716.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 61360739521 + 345030625 = 247711^2 + 18575^2 .

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

It is a super-2 number, since 2×61705770146² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 61705770097 and 61705770106.

It is not an unprimeable number, because it can be changed into a prime (61705770143) 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, 1656731 + ... + 1693566.

Almost surely, 2^61705770146 is an apocalyptic number.

61705770146 is a deficient number, since it is larger than the sum of its proper divisors (30862963594).

61705770146 is a wasteful number, since it uses less digits than its factorization.

61705770146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3359508.

The product of its (nonzero) digits is 246960, while the sum is 44.

The spelling of 61705770146 in words is "sixty-one billion, seven hundred five million, seven hundred seventy thousand, one hundred forty-six".