62768640021 has 4 divisors (see below), whose sum is σ = 83691520032. Its totient is φ = 41845760012.

The previous prime is 62768640019. The next prime is 62768640037. The reversal of 62768640021 is 12004686726.

62768640021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 62768640021 - 2¹ = 62768640019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (62768640041) 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, 10461440001 + ... + 10461440006.

It is an arithmetic number, because the mean of its divisors is an integer number (20922880008).

Almost surely, 2^62768640021 is an apocalyptic number.

It is an amenable number.

62768640021 is a deficient number, since it is larger than the sum of its proper divisors (20922880011).

62768640021 is a wasteful number, since it uses less digits than its factorization.

62768640021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20922880010.

The product of its (nonzero) digits is 193536, while the sum is 42.

The spelling of 62768640021 in words is "sixty-two billion, seven hundred sixty-eight million, six hundred forty thousand, twenty-one".