73473778404 has 216 divisors, whose sum is σ = 214424840448. Its totient is φ = 21874898880.

The previous prime is 73473778397. The next prime is 73473778409. The reversal of 73473778404 is 40487737437.

It is a happy number.

It is a super-2 number, since 2×73473778404² (a number of 23 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (73473778409) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 10572859 + ... + 10579805.

Almost surely, 2^73473778404 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 73473778404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107212420224).

73473778404 is an abundant number, since it is smaller than the sum of its proper divisors (140951062044).

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

73473778404 is a wasteful number, since it uses less digits than its factorization.

73473778404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7019 (or 6996 counting only the distinct ones).

The product of its (nonzero) digits is 11063808, while the sum is 54.

The spelling of 73473778404 in words is "seventy-three billion, four hundred seventy-three million, seven hundred seventy-eight thousand, four hundred four".