2505205678108 has 72 divisors (see below), whose sum is σ = 5179206968208. Its totient is φ = 1056979655424.

The previous prime is 2505205678099. The next prime is 2505205678111. The reversal of 2505205678108 is 8018765025052.

It is a super-2 number, since 2×2505205678108² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21438816 + ... + 21555352.

It is an arithmetic number, because the mean of its divisors is an integer number (71933430114).

Almost surely, 2^{2505205678108} is an apocalyptic number.

2505205678108 is a gapful number since it is divisible by the number (28) 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 2505205678108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2589603484104).

2505205678108 is an abundant number, since it is smaller than the sum of its proper divisors (2674001290100).

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

2505205678108 is a wasteful number, since it uses less digits than its factorization.

2505205678108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118259 (or 118250 counting only the distinct ones).

The product of its (nonzero) digits is 1344000, while the sum is 49.

The spelling of 2505205678108 in words is "two trillion, five hundred five billion, two hundred five million, six hundred seventy-eight thousand, one hundred eight".