51501449733 has 4 divisors (see below), whose sum is σ = 68668599648. Its totient is φ = 34334299820.

The previous prime is 51501449689. The next prime is 51501449737. The reversal of 51501449733 is 33794410515.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51501449733 - 2⁶ = 51501449669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51501449737) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8583574953 + ... + 8583574958.

It is an arithmetic number, because the mean of its divisors is an integer number (17167149912).

Almost surely, 2^51501449733 is an apocalyptic number.

It is an amenable number.

51501449733 is a deficient number, since it is larger than the sum of its proper divisors (17167149915).

51501449733 is a wasteful number, since it uses less digits than its factorization.

51501449733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17167149914.

The product of its (nonzero) digits is 226800, while the sum is 42.

The spelling of 51501449733 in words is "fifty-one billion, five hundred one million, four hundred forty-nine thousand, seven hundred thirty-three".