621254044411536 has 160 divisors (see below), whose sum is σ = 1625640072376320. Its totient is φ = 204425215948800.

The previous prime is 621254044411519. The next prime is 621254044411543. The reversal of 621254044411536 is 635114440452126.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2076379995 + ... + 2076679173.

It is an arithmetic number, because the mean of its divisors is an integer number (10160250452352).

Almost surely, 2^{621254044411536} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 621254044411536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (812820036188160).

621254044411536 is an abundant number, since it is smaller than the sum of its proper divisors (1004386027964784).

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

621254044411536 is a wasteful number, since it uses less digits than its factorization.

621254044411536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300845 (or 300839 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 48.

The spelling of 621254044411536 in words is "six hundred twenty-one trillion, two hundred fifty-four billion, forty-four million, four hundred eleven thousand, five hundred thirty-six".