73640371392 has 168 divisors, whose sum is σ = 245320108800. Its totient is φ = 20683427328.

The previous prime is 73640371373. The next prime is 73640371393. The reversal of 73640371392 is 29317304637.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (168).

It is not an unprimeable number, because it can be changed into a prime (73640371393) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83109 + ... + 392667.

Almost surely, 2^73640371392 is an apocalyptic number.

73640371392 is a gapful number since it is divisible by the number (72) 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 73640371392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122660054400).

73640371392 is an abundant number, since it is smaller than the sum of its proper divisors (171679737408).

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

73640371392 is a wasteful number, since it uses less digits than its factorization.

73640371392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309643 (or 309630 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 45.

The spelling of 73640371392 in words is "seventy-three billion, six hundred forty million, three hundred seventy-one thousand, three hundred ninety-two".