722778021450 has 384 divisors, whose sum is σ = 2095258752000. Its totient is φ = 185249514240.

The previous prime is 722778021437. The next prime is 722778021463. The reversal of 722778021450 is 54120877227.

It is an interprime number because it is at equal distance from previous prime (722778021437) and next prime (722778021463).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 722778021396 and 722778021405.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1005254191 + ... + 1005254909.

It is an arithmetic number, because the mean of its divisors is an integer number (5456403000).

Almost surely, 2^722778021450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 722778021450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1047629376000).

722778021450 is an abundant number, since it is smaller than the sum of its proper divisors (1372480730550).

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

722778021450 is a wasteful number, since it uses less digits than its factorization.

722778021450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098 (or 1075 counting only the distinct ones).

The product of its (nonzero) digits is 439040, while the sum is 45.

Adding to 722778021450 its reverse (54120877227), we get a palindrome (776898898677).

The spelling of 722778021450 in words is "seven hundred twenty-two billion, seven hundred seventy-eight million, twenty-one thousand, four hundred fifty".