65621421504346 has 16 divisors (see below), whose sum is σ = 98631509306400. Its totient is φ = 32744280746128.

The previous prime is 65621421504343. The next prime is 65621421504389. The reversal of 65621421504346 is 64340512412656.

It is a self number, because there is not a number n which added to its sum of digits gives 65621421504346.

It is not an unprimeable number, because it can be changed into a prime (65621421504343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2724961 + ... + 11775748.

It is an arithmetic number, because the mean of its divisors is an integer number (6164469331650).

Almost surely, 2^{65621421504346} is an apocalyptic number.

65621421504346 is a deficient number, since it is larger than the sum of its proper divisors (33010087802054).

65621421504346 is a wasteful number, since it uses less digits than its factorization.

65621421504346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14505293.

The product of its (nonzero) digits is 4147200, while the sum is 49.

The spelling of 65621421504346 in words is "sixty-five trillion, six hundred twenty-one billion, four hundred twenty-one million, five hundred four thousand, three hundred forty-six".