25721230140036 has 36 divisors (see below), whose sum is σ = 65344275360000. Its totient is φ = 8530659240048.

The previous prime is 25721230140017. The next prime is 25721230140037. The reversal of 25721230140036 is 63004103212752.

25721230140036 is a `hidden beast` number, since 2 + 5 + 7 + 212 + 3 + 0 + 1 + 400 + 36 = 666.

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

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

It is not an unprimeable number, because it can be changed into a prime (25721230140037) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1795165236 + ... + 1795179563.

It is an arithmetic number, because the mean of its divisors is an integer number (1815118760000).

Almost surely, 2^{25721230140036} is an apocalyptic number.

It is an amenable number.

25721230140036 is an abundant number, since it is smaller than the sum of its proper divisors (39623045219964).

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

25721230140036 is a wasteful number, since it uses less digits than its factorization.

25721230140036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3590345008 (or 3590345003 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

Adding to 25721230140036 its reverse (63004103212752), we get a palindrome (88725333352788).

The spelling of 25721230140036 in words is "twenty-five trillion, seven hundred twenty-one billion, two hundred thirty million, one hundred forty thousand, thirty-six".