73445551451 has 2 divisors, whose sum is σ = 73445551452. Its totient is φ = 73445551450.

The previous prime is 73445551381. The next prime is 73445551489. The reversal of 73445551451 is 15415554437.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (15415554437) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73445551451 - 2¹⁰ = 73445550427 is a prime.

It is not a weakly prime, because it can be changed into another prime (73445551651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36722775725 + 36722775726.

It is an arithmetic number, because the mean of its divisors is an integer number (36722775726).

Almost surely, 2^73445551451 is an apocalyptic number.

73445551451 is a deficient number, since it is larger than the sum of its proper divisors (1).

73445551451 is an equidigital number, since it uses as much as digits as its factorization.

73445551451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 840000, while the sum is 44.

The spelling of 73445551451 in words is "seventy-three billion, four hundred forty-five million, five hundred fifty-one thousand, four hundred fifty-one".