1721006070345 has 24 divisors (see below), whose sum is σ = 2990591267976. Its totient is φ = 915557879808.

The previous prime is 1721006070337. The next prime is 1721006070347. The reversal of 1721006070345 is 5430706001271.

It is a happy number.

1721006070345 is a `hidden beast` number, since 1 + 7 + 2 + 1 + 0 + 0 + 607 + 0 + 3 + 45 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 178807196736 + 1542198873609 = 422856^2 + 1241853^2 .

It is not a de Polignac number, because 1721006070345 - 2³ = 1721006070337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1721006070347) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48149112 + ... + 48184841.

It is an arithmetic number, because the mean of its divisors is an integer number (124607969499).

Almost surely, 2^{1721006070345} is an apocalyptic number.

1721006070345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1721006070345 is a deficient number, since it is larger than the sum of its proper divisors (1269585197631).

1721006070345 is a wasteful number, since it uses less digits than its factorization.

1721006070345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96334361 (or 96334358 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The spelling of 1721006070345 in words is "one trillion, seven hundred twenty-one billion, six million, seventy thousand, three hundred forty-five".