73401111040 has 80 divisors (see below), whose sum is σ = 176110391160. Its totient is φ = 29340467200.

The previous prime is 73401111029. The next prime is 73401111053. The reversal of 73401111040 is 4011110437.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 72227637504 + 1173473536 = 268752^2 + 34256^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4089606 + ... + 4107514.

Almost surely, 2^73401111040 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 73401111040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88055195580).

73401111040 is an abundant number, since it is smaller than the sum of its proper divisors (102709280120).

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

73401111040 is a wasteful number, since it uses less digits than its factorization.

73401111040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19533 (or 19517 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 22.

Adding to 73401111040 its reverse (4011110437), we get a palindrome (77412221477).

The spelling of 73401111040 in words is "seventy-three billion, four hundred one million, one hundred eleven thousand, forty".