981532077139500 has 192 divisors, whose sum is σ = 2928105751753728. Its totient is φ = 255342970560000.

The previous prime is 981532077139351. The next prime is 981532077139511. The reversal of 981532077139500 is 5931770235189.

It is a hoax number, since the sum of its digits (60) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1068595435 + ... + 1069513565.

It is an arithmetic number, because the mean of its divisors is an integer number (15250550790384).

Almost surely, 2^{981532077139500} 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 981532077139500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1464052875876864).

981532077139500 is an abundant number, since it is smaller than the sum of its proper divisors (1946573674614228).

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

981532077139500 is a wasteful number, since it uses less digits than its factorization.

981532077139500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935577 (or 935565 counting only the distinct ones).

The product of its (nonzero) digits is 14288400, while the sum is 60.

The spelling of 981532077139500 in words is "nine hundred eighty-one trillion, five hundred thirty-two billion, seventy-seven million, one hundred thirty-nine thousand, five hundred".