51267908655527 has 4 divisors (see below), whose sum is σ = 52921712160576. Its totient is φ = 49614105150480.

The previous prime is 51267908655497. The next prime is 51267908655559. The reversal of 51267908655527 is 72555680976215.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51267908655527 - 2¹⁰ = 51267908654503 is a prime.

It is a super-2 number, since 2×51267908655527² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51267908655127) 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, 826901752478 + ... + 826901752539.

It is an arithmetic number, because the mean of its divisors is an integer number (13230428040144).

Almost surely, 2^{51267908655527} is an apocalyptic number.

51267908655527 is a deficient number, since it is larger than the sum of its proper divisors (1653803505049).

51267908655527 is a wasteful number, since it uses less digits than its factorization.

51267908655527 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1653803505048.

The product of its (nonzero) digits is 317520000, while the sum is 68.

The spelling of 51267908655527 in words is "fifty-one trillion, two hundred sixty-seven billion, nine hundred eight million, six hundred fifty-five thousand, five hundred twenty-seven".