621341246056451 has 8 divisors (see below), whose sum is σ = 641384817475584. Its totient is φ = 601297693725960.

The previous prime is 621341246056441. The next prime is 621341246056523. The reversal of 621341246056451 is 154650642143126.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-621341246056451 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 621341246056451.

It is not an unprimeable number, because it can be changed into a prime (621341246056441) 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, 93502910 + ... + 99927356.

It is an arithmetic number, because the mean of its divisors is an integer number (80173102184448).

Almost surely, 2^{621341246056451} is an apocalyptic number.

621341246056451 is a deficient number, since it is larger than the sum of its proper divisors (20043571419133).

621341246056451 is a wasteful number, since it uses less digits than its factorization.

621341246056451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9544321.

The product of its (nonzero) digits is 4147200, while the sum is 50.

Adding to 621341246056451 its reverse (154650642143126), we get a palindrome (775991888199577).

The spelling of 621341246056451 in words is "six hundred twenty-one trillion, three hundred forty-one billion, two hundred forty-six million, fifty-six thousand, four hundred fifty-one".