981015372540 has 216 divisors, whose sum is σ = 3612672484512. Its totient is φ = 211041884160.

The previous prime is 981015372499. The next prime is 981015372541. The reversal of 981015372540 is 45273510189.

981015372540 is a `hidden beast` number, since 9 + 8 + 101 + 537 + 2 + 5 + 4 + 0 = 666.

It is a super-2 number, since 2×981015372540² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981015372541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 982891 + ... + 1711170.

Almost surely, 2^981015372540 is an apocalyptic number.

981015372540 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

981015372540 is an abundant number, since it is smaller than the sum of its proper divisors (2631657111972).

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

981015372540 is a wasteful number, since it uses less digits than its factorization.

981015372540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2694117 (or 2694095 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The spelling of 981015372540 in words is "nine hundred eighty-one billion, fifteen million, three hundred seventy-two thousand, five hundred forty".