51355510245 has 80 divisors (see below), whose sum is σ = 100255866480. Its totient is φ = 24998409216.

The previous prime is 51355510211. The next prime is 51355510289. The reversal of 51355510245 is 54201555315.

51355510245 is a `hidden beast` number, since 5 + 135 + 5 + 510 + 2 + 4 + 5 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 170067681 + 51185442564 = 13041^2 + 226242^2 .

It is not a de Polignac number, because 51355510245 - 2¹² = 51355506149 is a prime.

It is a super-3 number, since 3×51355510245³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 413787 + ... + 523383.

It is an arithmetic number, because the mean of its divisors is an integer number (1253198331).

Almost surely, 2^51355510245 is an apocalyptic number.

It is an amenable number.

51355510245 is a deficient number, since it is larger than the sum of its proper divisors (48900356235).

51355510245 is a wasteful number, since it uses less digits than its factorization.

51355510245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109716 (or 109707 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 36.

The spelling of 51355510245 in words is "fifty-one billion, three hundred fifty-five million, five hundred ten thousand, two hundred forty-five".