213661025464044 has 72 divisors (see below), whose sum is σ = 529605948272128. Its totient is φ = 67029331334400.

The previous prime is 213661025464001. The next prime is 213661025464049. The reversal of 213661025464044 is 440464520166312.

213661025464044 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 213661025463984 and 213661025464002.

It is not an unprimeable number, because it can be changed into a prime (213661025464049) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 151135869 + ... + 152543019.

Almost surely, 2^{213661025464044} is an apocalyptic number.

It is an amenable number.

213661025464044 is an abundant number, since it is smaller than the sum of its proper divisors (315944922808084).

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

213661025464044 is a wasteful number, since it uses less digits than its factorization.

213661025464044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1450975 (or 1450956 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 48.

The spelling of 213661025464044 in words is "two hundred thirteen trillion, six hundred sixty-one billion, twenty-five million, four hundred sixty-four thousand, forty-four".