621236061412644 has 48 divisors (see below), whose sum is σ = 1451480623383168. Its totient is φ = 206803005147648.

The previous prime is 621236061412537. The next prime is 621236061412691. The reversal of 621236061412644 is 446214160632126.

It is a junction number, because it is equal to n+sod(n) for n = 621236061412593 and 621236061412602.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1055929849 + ... + 1056518015.

It is an arithmetic number, because the mean of its divisors is an integer number (30239179653816).

Almost surely, 2^{621236061412644} is an apocalyptic number.

It is an amenable number.

621236061412644 is an abundant number, since it is smaller than the sum of its proper divisors (830244561970524).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

621236061412644 is a wasteful number, since it uses less digits than its factorization.

621236061412644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705204 (or 705202 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 48.

The spelling of 621236061412644 in words is "six hundred twenty-one trillion, two hundred thirty-six billion, sixty-one million, four hundred twelve thousand, six hundred forty-four".