1722427312738 has 16 divisors (see below), whose sum is σ = 2818544643936. Its totient is φ = 782913943840.

The previous prime is 1722427312733. The next prime is 1722427312787. The reversal of 1722427312738 is 8372137242271.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1722427312691 and 1722427312700.

It is not an unprimeable number, because it can be changed into a prime (1722427312733) 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, 2407470 + ... + 3039862.

It is an arithmetic number, because the mean of its divisors is an integer number (176159040246).

Almost surely, 2^{1722427312738} is an apocalyptic number.

1722427312738 is a deficient number, since it is larger than the sum of its proper divisors (1096117331198).

1722427312738 is a wasteful number, since it uses less digits than its factorization.

1722427312738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756209.

The product of its digits is 1580544, while the sum is 49.

The spelling of 1722427312738 in words is "one trillion, seven hundred twenty-two billion, four hundred twenty-seven million, three hundred twelve thousand, seven hundred thirty-eight".