5401660986540 has 1536 divisors, whose sum is σ = 22620113510400. Its totient is φ = 1038405795840.

The previous prime is 5401660986539. The next prime is 5401660986571. The reversal of 5401660986540 is 456890661045.

5401660986540 is a `hidden beast` number, since 5 + 4 + 0 + 1 + 6 + 6 + 0 + 98 + 6 + 540 = 666.

It is a super-2 number, since 2×5401660986540² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 511 ways as a sum of consecutive naturals, for example, 2794443414 + ... + 2794445346.

It is an arithmetic number, because the mean of its divisors is an integer number (14726636400).

Almost surely, 2^{5401660986540} 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 5401660986540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11310056755200).

5401660986540 is an abundant number, since it is smaller than the sum of its proper divisors (17218452523860).

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

5401660986540 is a wasteful number, since it uses less digits than its factorization.

5401660986540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2104 (or 2096 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 54.

The spelling of 5401660986540 in words is "five trillion, four hundred one billion, six hundred sixty million, nine hundred eighty-six thousand, five hundred forty".