73702040200078 has 4 divisors (see below), whose sum is σ = 110553060300120. Its totient is φ = 36851020100038.

The previous prime is 73702040200057. The next prime is 73702040200079. The reversal of 73702040200078 is 87000204020737.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 73702040200078.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73702040200079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18425510050018 + ... + 18425510050021.

It is an arithmetic number, because the mean of its divisors is an integer number (27638265075030).

Almost surely, 2^{73702040200078} is an apocalyptic number.

73702040200078 is a deficient number, since it is larger than the sum of its proper divisors (36851020100042).

73702040200078 is a wasteful number, since it uses less digits than its factorization.

73702040200078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36851020100041.

The product of its (nonzero) digits is 131712, while the sum is 40.

The spelling of 73702040200078 in words is "seventy-three trillion, seven hundred two billion, forty million, two hundred thousand, seventy-eight".