7887490371540 has 1440 divisors, whose sum is σ = 28978332235776. Its totient is φ = 1790535352320.

The previous prime is 7887490371529. The next prime is 7887490371547. The reversal of 7887490371540 is 451730947887.

7887490371540 is a `hidden beast` number, since 7 + 8 + 87 + 4 + 9 + 0 + 3 + 7 + 1 + 540 = 666.

It is a super-2 number, since 2×7887490371540² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7887490371547) by changing a digit.

It is a polite number, since it can be written in 479 ways as a sum of consecutive naturals, for example, 35369911869 + ... + 35369912091.

Almost surely, 2^{7887490371540} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7887490371540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14489166117888).

7887490371540 is an abundant number, since it is smaller than the sum of its proper divisors (21090841864236).

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

7887490371540 is a wasteful number, since it uses less digits than its factorization.

7887490371540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471 (or 447 counting only the distinct ones).

The product of its (nonzero) digits is 47416320, while the sum is 63.

The spelling of 7887490371540 in words is "seven trillion, eight hundred eighty-seven billion, four hundred ninety million, three hundred seventy-one thousand, five hundred forty".