51650551551 has 16 divisors (see below), whose sum is σ = 69499653120. Its totient is φ = 34117776000.

The previous prime is 51650551507. The next prime is 51650551559. The reversal of 51650551551 is 15515505615.

It is not a de Polignac number, because 51650551551 - 2¹⁹ = 51650027263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51650551559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1081426 + ... + 1128176.

It is an arithmetic number, because the mean of its divisors is an integer number (4343728320).

Almost surely, 2^51650551551 is an apocalyptic number.

51650551551 is a deficient number, since it is larger than the sum of its proper divisors (17849101569).

51650551551 is a wasteful number, since it uses less digits than its factorization.

51650551551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50126.

The product of its (nonzero) digits is 93750, while the sum is 39.

The spelling of 51650551551 in words is "fifty-one billion, six hundred fifty million, five hundred fifty-one thousand, five hundred fifty-one".