216620266045 has 16 divisors (see below), whose sum is σ = 267202050048. Its totient is φ = 168465873600.

The previous prime is 216620266021. The next prime is 216620266117. The reversal of 216620266045 is 540662026612.

It is not a de Polignac number, because 216620266045 - 2³¹ = 214472782397 is a prime.

It is a super-4 number, since 4×216620266045⁴ (a number of 46 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 216620265989 and 216620266007.

It is a congruent 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, 295719 + ... + 721588.

It is an arithmetic number, because the mean of its divisors is an integer number (16700128128).

Almost surely, 2^216620266045 is an apocalyptic number.

It is an amenable number.

216620266045 is a deficient number, since it is larger than the sum of its proper divisors (50581784003).

216620266045 is a wasteful number, since it uses less digits than its factorization.

216620266045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018500.

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 216620266045 in words is "two hundred sixteen billion, six hundred twenty million, two hundred sixty-six thousand, forty-five".