44132778677621 has 2 divisors, whose sum is σ = 44132778677622. Its totient is φ = 44132778677620.

The previous prime is 44132778677587. The next prime is 44132778677657. The reversal of 44132778677621 is 12677687723144.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43573333020100 + 559445657521 = 6601010^2 + 747961^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-44132778677621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44132778677821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22066389338810 + 22066389338811.

It is an arithmetic number, because the mean of its divisors is an integer number (22066389338811).

Almost surely, 2^{44132778677621} is an apocalyptic number.

It is an amenable number.

44132778677621 is a deficient number, since it is larger than the sum of its proper divisors (1).

44132778677621 is an equidigital number, since it uses as much as digits as its factorization.

44132778677621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 132765696, while the sum is 65.

The spelling of 44132778677621 in words is "forty-four trillion, one hundred thirty-two billion, seven hundred seventy-eight million, six hundred seventy-seven thousand, six hundred twenty-one".