25000040000000 has 640 divisors, whose sum is σ = 67939813573632. Its totient is φ = 9135360000000.

The previous prime is 25000039999951. The next prime is 25000040000017. The reversal of 25000040000000 is 4000052.

It is a sliding number, since 25000040000000 = 40000000 + 25000000000000 and 1/40000000 + 1/25000000000000 = 0.000000025000040000000.

It is a tau number, because it is divible by the number of its divisors (640).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 68119999817 + ... + 68120000183.

Almost surely, 2^{25000040000000} is an apocalyptic number.

25000040000000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25000040000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33969906786816).

25000040000000 is an abundant number, since it is smaller than the sum of its proper divisors (42939773573632).

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

25000040000000 is an frugal number, since it uses more digits than its factorization.

25000040000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564 (or 518 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 11.

Adding to 25000040000000 its reverse (4000052), we get a palindrome (25000044000052).

It can be divided in two parts, 250000 and 40000000, that multiplied together give a 13-th power (10000000000000 = 10¹³).

The spelling of 25000040000000 in words is "twenty-five trillion, forty million", and thus it is an aban number and an uban number.