62646639389 has 4 divisors (see below), whose sum is σ = 62789342880. Its totient is φ = 62503935900.

The previous prime is 62646639353. The next prime is 62646639443. The reversal of 62646639389 is 98393664626.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98393664626 = 2 ⋅49196832313.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-62646639389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (62646639329) 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, 71351087 + ... + 71351964.

It is an arithmetic number, because the mean of its divisors is an integer number (15697335720).

Almost surely, 2^62646639389 is an apocalyptic number.

It is an amenable number.

62646639389 is a deficient number, since it is larger than the sum of its proper divisors (142703491).

62646639389 is a wasteful number, since it uses less digits than its factorization.

62646639389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142703490.

The product of its digits is 60466176, while the sum is 62.

The spelling of 62646639389 in words is "sixty-two billion, six hundred forty-six million, six hundred thirty-nine thousand, three hundred eighty-nine".