99485207640 has 1920 divisors, whose sum is σ = 458843616000. Its totient is φ = 19093874688.

The previous prime is 99485207573. The next prime is 99485207681. The reversal of 99485207640 is 4670258499.

99485207640 is a `hidden beast` number, since 9 + 9 + 4 + 8 + 520 + 76 + 40 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 479 ways as a sum of consecutive naturals, for example, 1686189931 + ... + 1686189989.

It is an arithmetic number, because the mean of its divisors is an integer number (238981050).

Almost surely, 2^99485207640 is an apocalyptic number.

99485207640 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99485207640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229421808000).

99485207640 is an abundant number, since it is smaller than the sum of its proper divisors (359358408360).

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

99485207640 is a wasteful number, since it uses less digits than its factorization.

99485207640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171 (or 151 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 99485207640 in words is "ninety-nine billion, four hundred eighty-five million, two hundred seven thousand, six hundred forty".