2129051206404 has 36 divisors (see below), whose sum is σ = 5382037338496. Its totient is φ = 709648261488.

The previous prime is 2129051206391. The next prime is 2129051206439. The reversal of 2129051206404 is 4046021509212.

It is a happy number.

2129051206404 is a `hidden beast` number, since 2 + 1 + 2 + 9 + 0 + 5 + 1 + 2 + 0 + 640 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×2129051206404² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 742864 + ... + 2193159.

Almost surely, 2^{2129051206404} is an apocalyptic number.

It is an amenable number.

2129051206404 is an abundant number, since it is smaller than the sum of its proper divisors (3252986132092).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2129051206404 is a wasteful number, since it uses less digits than its factorization.

2129051206404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2956176 (or 2956171 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 2129051206404 in words is "two trillion, one hundred twenty-nine billion, fifty-one million, two hundred six thousand, four hundred four".