73999240306464 has 192 divisors, whose sum is σ = 214025253184512. Its totient is φ = 22200919680000.

The previous prime is 73999240306463. The next prime is 73999240306471. The reversal of 73999240306464 is 46460304299937.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a junction number, because it is equal to n+sod(n) for n = 73999240306395 and 73999240306404.

It is not an unprimeable number, because it can be changed into a prime (73999240306463) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43428474 + ... + 45100230.

It is an arithmetic number, because the mean of its divisors is an integer number (1114714860336).

Almost surely, 2^{73999240306464} 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 73999240306464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107012626592256).

73999240306464 is an abundant number, since it is smaller than the sum of its proper divisors (140026012878048).

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

73999240306464 is a wasteful number, since it uses less digits than its factorization.

73999240306464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672199 (or 1672191 counting only the distinct ones).

The product of its (nonzero) digits is 211631616, while the sum is 66.

The spelling of 73999240306464 in words is "seventy-three trillion, nine hundred ninety-nine billion, two hundred forty million, three hundred six thousand, four hundred sixty-four".