51662327620261 has 4 divisors (see below), whose sum is σ = 51665697430624. Its totient is φ = 51658957809900.

The previous prime is 51662327620259. The next prime is 51662327620273. The reversal of 51662327620261 is 16202672326615.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51662327620261 - 2¹ = 51662327620259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51662327630261) 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, 1684882185 + ... + 1684912846.

It is an arithmetic number, because the mean of its divisors is an integer number (12916424357656).

Almost surely, 2^{51662327620261} is an apocalyptic number.

It is an amenable number.

51662327620261 is a deficient number, since it is larger than the sum of its proper divisors (3369810363).

51662327620261 is a wasteful number, since it uses less digits than its factorization.

51662327620261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3369810362.

The product of its (nonzero) digits is 2177280, while the sum is 49.

Adding to 51662327620261 its reverse (16202672326615), we get a palindrome (67864999946876).

The spelling of 51662327620261 in words is "fifty-one trillion, six hundred sixty-two billion, three hundred twenty-seven million, six hundred twenty thousand, two hundred sixty-one".