16671264740421 has 16 divisors (see below), whose sum is σ = 22850969144640. Its totient is φ = 10804784158080.

The previous prime is 16671264740341. The next prime is 16671264740477. The reversal of 16671264740421 is 12404746217661.

It is not a de Polignac number, because 16671264740421 - 2³¹ = 16669117256773 is a prime.

It is a super-2 number, since 2×16671264740421² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16671264741421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 239432926 + ... + 239502543.

It is an arithmetic number, because the mean of its divisors is an integer number (1428185571540).

Almost surely, 2^{16671264740421} is an apocalyptic number.

It is an amenable number.

16671264740421 is a deficient number, since it is larger than the sum of its proper divisors (6179704404219).

16671264740421 is a wasteful number, since it uses less digits than its factorization.

16671264740421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478935796.

The product of its (nonzero) digits is 2709504, while the sum is 51.

The spelling of 16671264740421 in words is "sixteen trillion, six hundred seventy-one billion, two hundred sixty-four million, seven hundred forty thousand, four hundred twenty-one".