1081698624 has 280 divisors, whose sum is σ = 3398934528. Its totient is φ = 339655680.

The previous prime is 1081698599. The next prime is 1081698641. The reversal of 1081698624 is 4268961801.

1081698624 is a `hidden beast` number, since 1 + 0 + 8 + 16 + 9 + 8 + 624 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1081698624.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 8517249 + ... + 8517375.

Almost surely, 2^1081698624 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 1081698624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1699467264).

1081698624 is an abundant number, since it is smaller than the sum of its proper divisors (2317235904).

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

1081698624 is a wasteful number, since it uses less digits than its factorization.

1081698624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235 (or 216 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 1081698624 is about 32889.1870376876. The cubic root of 1081698624 is about 1026.5231762881.

The spelling of 1081698624 in words is "one billion, eighty-one million, six hundred ninety-eight thousand, six hundred twenty-four".