73870621447 has 24 divisors (see below), whose sum is σ = 88371888000. Its totient is φ = 61534042416.

The previous prime is 73870621411. The next prime is 73870621459. The reversal of 73870621447 is 74412607837.

It is a happy number.

It is not a de Polignac number, because 73870621447 - 2³⁵ = 39510883079 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 73870621447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73870621247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 331204 + ... + 507382.

It is an arithmetic number, because the mean of its divisors is an integer number (3682162000).

Almost surely, 2^73870621447 is an apocalyptic number.

73870621447 is a deficient number, since it is larger than the sum of its proper divisors (14501266553).

73870621447 is a wasteful number, since it uses less digits than its factorization.

73870621447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176435 (or 176428 counting only the distinct ones).

The product of its (nonzero) digits is 1580544, while the sum is 49.

The spelling of 73870621447 in words is "seventy-three billion, eight hundred seventy million, six hundred twenty-one thousand, four hundred forty-seven".