620451720770447 has 8 divisors (see below), whose sum is σ = 625191624554112. Its totient is φ = 615711872003800.

The previous prime is 620451720770377. The next prime is 620451720770471. The reversal of 620451720770447 is 744077027154026.

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

It is a cyclic number.

It is not a de Polignac number, because 620451720770447 - 2¹⁸ = 620451720508303 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 620451720770392 and 620451720770401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620451720770647) 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, 9030422 + ... + 36365532.

It is an arithmetic number, because the mean of its divisors is an integer number (78148953069264).

Almost surely, 2^{620451720770447} is an apocalyptic number.

620451720770447 is a deficient number, since it is larger than the sum of its proper divisors (4739903783665).

620451720770447 is a wasteful number, since it uses less digits than its factorization.

620451720770447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27508509.

The product of its (nonzero) digits is 18439680, while the sum is 56.

The spelling of 620451720770447 in words is "six hundred twenty trillion, four hundred fifty-one billion, seven hundred twenty million, seven hundred seventy thousand, four hundred forty-seven".