61936774646 has 8 divisors (see below), whose sum is σ = 92915265024. Its totient is φ = 30965019640.

The previous prime is 61936774643. The next prime is 61936774661. The reversal of 61936774646 is 64647763916.

61936774646 = 124434² + 124435² + ... + 124437².

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61936774643) 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, 1660790 + ... + 1697673.

It is an arithmetic number, because the mean of its divisors is an integer number (11614408128).

Almost surely, 2^61936774646 is an apocalyptic number.

61936774646 is a deficient number, since it is larger than the sum of its proper divisors (30978490378).

61936774646 is a wasteful number, since it uses less digits than its factorization.

61936774646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3367686.

The product of its digits is 27433728, while the sum is 59.

The spelling of 61936774646 in words is "sixty-one billion, nine hundred thirty-six million, seven hundred seventy-four thousand, six hundred forty-six".