51245557670427 has 8 divisors (see below), whose sum is σ = 71923589712960. Its totient is φ = 32365615370760.

The previous prime is 51245557670381. The next prime is 51245557670441. The reversal of 51245557670427 is 72407675554215.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51245557670427 - 2²² = 51245553476123 is a prime.

It is a super-2 number, since 2×51245557670427² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51245557670497) 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, 449522435649 + ... + 449522435762.

It is an arithmetic number, because the mean of its divisors is an integer number (8990448714120).

Almost surely, 2^{51245557670427} is an apocalyptic number.

51245557670427 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

51245557670427 is a deficient number, since it is larger than the sum of its proper divisors (20678032042533).

51245557670427 is a wasteful number, since it uses less digits than its factorization.

51245557670427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899044871433.

The product of its (nonzero) digits is 82320000, while the sum is 60.

The spelling of 51245557670427 in words is "fifty-one trillion, two hundred forty-five billion, five hundred fifty-seven million, six hundred seventy thousand, four hundred twenty-seven".