73128552371 has 32 divisors (see below), whose sum is σ = 89555632128. Its totient is φ = 58361022720.

The previous prime is 73128552361. The next prime is 73128552397. The reversal of 73128552371 is 17325582137.

It is not a de Polignac number, because 73128552371 - 2²² = 73124358067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (73128552311) 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, 1049951 + ... + 1117431.

It is an arithmetic number, because the mean of its divisors is an integer number (2798613504).

Almost surely, 2^73128552371 is an apocalyptic number.

73128552371 is a deficient number, since it is larger than the sum of its proper divisors (16427079757).

73128552371 is a wasteful number, since it uses less digits than its factorization.

73128552371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67691.

The product of its digits is 352800, while the sum is 44.

The spelling of 73128552371 in words is "seventy-three billion, one hundred twenty-eight million, five hundred fifty-two thousand, three hundred seventy-one".