73780338672 has 40 divisors (see below), whose sum is σ = 211776899280. Its totient is φ = 24593446080.

The previous prime is 73780338649. The next prime is 73780338673. The reversal of 73780338672 is 27683308737.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73780338673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85393479 + ... + 85394342.

It is an arithmetic number, because the mean of its divisors is an integer number (5294422482).

Almost surely, 2^73780338672 is an apocalyptic number.

73780338672 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

73780338672 is an abundant number, since it is smaller than the sum of its proper divisors (137996560608).

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

73780338672 is a wasteful number, since it uses less digits than its factorization.

73780338672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170787838 (or 170787826 counting only the distinct ones).

The product of its (nonzero) digits is 7112448, while the sum is 54.

The spelling of 73780338672 in words is "seventy-three billion, seven hundred eighty million, three hundred thirty-eight thousand, six hundred seventy-two".