51290693253 has 24 divisors (see below), whose sum is σ = 74663225208. Its totient is φ = 33928578432.

The previous prime is 51290693239. The next prime is 51290693263. The reversal of 51290693253 is 35239609215.

51290693253 is a `hidden beast` number, since 51 + 290 + 69 + 3 + 253 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 14266391364 + 37024301889 = 119442^2 + 192417^2 .

It is not a de Polignac number, because 51290693253 - 2¹⁴ = 51290676869 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51290693199 and 51290693208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51290693263) 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, 622551 + ... + 700107.

It is an arithmetic number, because the mean of its divisors is an integer number (3110967717).

Almost surely, 2^51290693253 is an apocalyptic number.

It is an amenable number.

51290693253 is a deficient number, since it is larger than the sum of its proper divisors (23372531955).

51290693253 is a wasteful number, since it uses less digits than its factorization.

51290693253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78133 (or 78130 counting only the distinct ones).

The product of its (nonzero) digits is 437400, while the sum is 45.

The spelling of 51290693253 in words is "fifty-one billion, two hundred ninety million, six hundred ninety-three thousand, two hundred fifty-three".