2540573549388 has 120 divisors (see below), whose sum is σ = 7597975500192. Its totient is φ = 725149449216.

The previous prime is 2540573549341. The next prime is 2540573549411. The reversal of 2540573549388 is 8839453750452.

2540573549388 is a `hidden beast` number, since 2 + 5 + 4 + 0 + 5 + 7 + 3 + 549 + 3 + 88 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1699420 + ... + 2822972.

Almost surely, 2^{2540573549388} is an apocalyptic number.

2540573549388 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 2540573549388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3798987750096).

2540573549388 is an abundant number, since it is smaller than the sum of its proper divisors (5057401950804).

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

2540573549388 is a wasteful number, since it uses less digits than its factorization.

2540573549388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124573 (or 1124562 counting only the distinct ones).

The product of its (nonzero) digits is 145152000, while the sum is 63.

The spelling of 2540573549388 in words is "two trillion, five hundred forty billion, five hundred seventy-three million, five hundred forty-nine thousand, three hundred eighty-eight".