61734573646 has 4 divisors (see below), whose sum is σ = 92601860472. Its totient is φ = 30867286822.

The previous prime is 61734573623. The next prime is 61734573671. The reversal of 61734573646 is 64637543716.

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

It is a super-2 number, since 2×61734573646² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61734573593 and 61734573602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15433643410 + ... + 15433643413.

It is an arithmetic number, because the mean of its divisors is an integer number (23150465118).

Almost surely, 2^61734573646 is an apocalyptic number.

61734573646 is a deficient number, since it is larger than the sum of its proper divisors (30867286826).

61734573646 is a wasteful number, since it uses less digits than its factorization.

61734573646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30867286825.

The product of its digits is 7620480, while the sum is 52.

The spelling of 61734573646 in words is "sixty-one billion, seven hundred thirty-four million, five hundred seventy-three thousand, six hundred forty-six".