981550631010 has 64 divisors (see below), whose sum is σ = 2377311078528. Its totient is φ = 259349443584.

The previous prime is 981550630961. The next prime is 981550631041. The reversal of 981550631010 is 10136055189.

It is a super-2 number, since 2×981550631010² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 981550631010.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11221404 + ... + 11308536.

It is an arithmetic number, because the mean of its divisors is an integer number (37145485602).

Almost surely, 2^981550631010 is an apocalyptic number.

981550631010 is an abundant number, since it is smaller than the sum of its proper divisors (1395760447518).

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

981550631010 is a wasteful number, since it uses less digits than its factorization.

981550631010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90579.

The product of its (nonzero) digits is 32400, while the sum is 39.

Adding to 981550631010 its reverse (10136055189), we get a palindrome (991686686199).

The spelling of 981550631010 in words is "nine hundred eighty-one billion, five hundred fifty million, six hundred thirty-one thousand, ten".