109521564390 has 192 divisors, whose sum is σ = 336550256640. Its totient is φ = 24181493760.

The previous prime is 109521564367. The next prime is 109521564403. The reversal of 109521564390 is 93465125901.

109521564390 is a `hidden beast` number, since 1 + 0 + 9 + 52 + 1 + 564 + 39 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 11263951 + ... + 11273669.

It is an arithmetic number, because the mean of its divisors is an integer number (1752865920).

Almost surely, 2^109521564390 is an apocalyptic number.

109521564390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 109521564390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168275128320).

109521564390 is an abundant number, since it is smaller than the sum of its proper divisors (227028692250).

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

109521564390 is a wasteful number, since it uses less digits than its factorization.

109521564390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10347 (or 10344 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The spelling of 109521564390 in words is "one hundred nine billion, five hundred twenty-one million, five hundred sixty-four thousand, three hundred ninety".