1722402990045 has 40 divisors (see below), whose sum is σ = 3087667731456. Its totient is φ = 918584911584.

The previous prime is 1722402990043. The next prime is 1722402990047. The reversal of 1722402990045 is 5400992042271.

It is an interprime number because it is at equal distance from previous prime (1722402990043) and next prime (1722402990047).

It is not a de Polignac number, because 1722402990045 - 2¹ = 1722402990043 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1722402990043) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 18381984 + ... + 18475446.

Almost surely, 2^{1722402990045} is an apocalyptic number.

1722402990045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1722402990045 is a deficient number, since it is larger than the sum of its proper divisors (1365264741411).

1722402990045 is an equidigital number, since it uses as much as digits as its factorization.

1722402990045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138983 (or 138974 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 1722402990045 in words is "one trillion, seven hundred twenty-two billion, four hundred two million, nine hundred ninety thousand, forty-five".