51654247694 has 16 divisors (see below), whose sum is σ = 88566615648. Its totient is φ = 22133415552.

The previous prime is 51654247693. The next prime is 51654247717. The reversal of 51654247694 is 49674245615.

It is a super-2 number, since 2×51654247694² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51654247693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264719 + ... + 416394.

It is an arithmetic number, because the mean of its divisors is an integer number (5535413478).

Almost surely, 2^51654247694 is an apocalyptic number.

51654247694 is a deficient number, since it is larger than the sum of its proper divisors (36912367954).

51654247694 is a wasteful number, since it uses less digits than its factorization.

51654247694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686539.

The product of its digits is 7257600, while the sum is 53.

The spelling of 51654247694 in words is "fifty-one billion, six hundred fifty-four million, two hundred forty-seven thousand, six hundred ninety-four".