51465202645 has 8 divisors (see below), whose sum is σ = 63264542040. Its totient is φ = 40167962880.

The previous prime is 51465202609. The next prime is 51465202681. The reversal of 51465202645 is 54620256415.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (51465202609) and next prime (51465202681).

It can be written as a sum of positive squares in 4 ways, for example, as 702409009 + 50762793636 = 26503^2 + 225306^2 .

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

It is not a de Polignac number, because 51465202645 - 2³¹ = 49317718997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51465202598 and 51465202607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125524680 + ... + 125525089.

It is an arithmetic number, because the mean of its divisors is an integer number (7908067755).

Almost surely, 2^51465202645 is an apocalyptic number.

It is an amenable number.

51465202645 is a deficient number, since it is larger than the sum of its proper divisors (11799339395).

51465202645 is a wasteful number, since it uses less digits than its factorization.

51465202645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251049815.

The product of its (nonzero) digits is 288000, while the sum is 40.

The spelling of 51465202645 in words is "fifty-one billion, four hundred sixty-five million, two hundred two thousand, six hundred forty-five".