17742621414545 has 16 divisors (see below), whose sum is σ = 21387221315328. Its totient is φ = 14130089314560.

The previous prime is 17742621414491. The next prime is 17742621414571. The reversal of 17742621414545 is 54541412624771.

It is not a de Polignac number, because 17742621414545 - 2¹⁶ = 17742621349009 is a prime.

It is a super-2 number, since 2×17742621414545² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 673562 + ... + 5994908.

It is an arithmetic number, because the mean of its divisors is an integer number (1336701332208).

Almost surely, 2^{17742621414545} is an apocalyptic number.

It is an amenable number.

17742621414545 is a deficient number, since it is larger than the sum of its proper divisors (3644599900783).

17742621414545 is a wasteful number, since it uses less digits than its factorization.

17742621414545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5324360.

The product of its digits is 7526400, while the sum is 53.

The spelling of 17742621414545 in words is "seventeen trillion, seven hundred forty-two billion, six hundred twenty-one million, four hundred fourteen thousand, five hundred forty-five".