1722239999979 has 8 divisors (see below), whose sum is σ = 2296462932432. Its totient is φ = 1148088533760.

The previous prime is 1722239999951. The next prime is 1722239999993. The reversal of 1722239999979 is 9799999322271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1722239999979 - 2²⁷ = 1722105782251 is a prime.

It is a super-2 number, since 2×1722239999979² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1722239999479) 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, 17810302 + ... + 17906739.

It is an arithmetic number, because the mean of its divisors is an integer number (287057866554).

Almost surely, 2^{1722239999979} is an apocalyptic number.

1722239999979 is a deficient number, since it is larger than the sum of its proper divisors (574222932453).

1722239999979 is a wasteful number, since it uses less digits than its factorization.

1722239999979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35733117.

The product of its digits is 624974616, while the sum is 78.

The spelling of 1722239999979 in words is "one trillion, seven hundred twenty-two billion, two hundred thirty-nine million, nine hundred ninety-nine thousand, nine hundred seventy-nine".