99732540654 has 160 divisors (see below), whose sum is σ = 233830080000. Its totient is φ = 31863785184.

The previous prime is 99732540619. The next prime is 99732540659. The reversal of 99732540654 is 45604523799.

99732540654 is a `hidden beast` number, since 9 + 9 + 7 + 32 + 540 + 65 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 99732540654.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99732540659) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 227180967 + ... + 227181405.

It is an arithmetic number, because the mean of its divisors is an integer number (1461438000).

Almost surely, 2^99732540654 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99732540654, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116915040000).

99732540654 is an abundant number, since it is smaller than the sum of its proper divisors (134097539346).

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

99732540654 is an equidigital number, since it uses as much as digits as its factorization.

99732540654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696 (or 672 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 54.

The spelling of 99732540654 in words is "ninety-nine billion, seven hundred thirty-two million, five hundred forty thousand, six hundred fifty-four".