73137771225 has 72 divisors (see below), whose sum is σ = 132278140800. Its totient is φ = 38627218560.

The previous prime is 73137771211. The next prime is 73137771227. The reversal of 73137771225 is 52217773137.

It is not a de Polignac number, because 73137771225 - 2⁴ = 73137771209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (73137771227) 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, 11630032 + ... + 11636318.

It is an arithmetic number, because the mean of its divisors is an integer number (1837196400).

Almost surely, 2^73137771225 is an apocalyptic number.

73137771225 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

73137771225 is a deficient number, since it is larger than the sum of its proper divisors (59140369575).

73137771225 is a wasteful number, since it uses less digits than its factorization.

73137771225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6799 (or 6791 counting only the distinct ones).

The product of its digits is 432180, while the sum is 45.

The spelling of 73137771225 in words is "seventy-three billion, one hundred thirty-seven million, seven hundred seventy-one thousand, two hundred twenty-five".