216376474187401 has 4 divisors (see below), whose sum is σ = 236047062749904. Its totient is φ = 196705885624900.

The previous prime is 216376474187399. The next prime is 216376474187479. The reversal of 216376474187401 is 104781474673612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 216376474187401 - 2¹ = 216376474187399 is a prime.

It is a super-2 number, since 2×216376474187401² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216376474187401.

It is not an unprimeable number, because it can be changed into a prime (216376474187491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9835294281235 + ... + 9835294281256.

It is an arithmetic number, because the mean of its divisors is an integer number (59011765687476).

Almost surely, 2^{216376474187401} is an apocalyptic number.

It is an amenable number.

216376474187401 is a deficient number, since it is larger than the sum of its proper divisors (19670588562503).

216376474187401 is a wasteful number, since it uses less digits than its factorization.

216376474187401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19670588562502.

The product of its (nonzero) digits is 37933056, while the sum is 61.

The spelling of 216376474187401 in words is "two hundred sixteen trillion, three hundred seventy-six billion, four hundred seventy-four million, one hundred eighty-seven thousand, four hundred one".