51210543621998 has 8 divisors (see below), whose sum is σ = 76816990955592. Its totient is φ = 25604879970136.

The previous prime is 51210543621973. The next prime is 51210543622003. The reversal of 51210543621998 is 89912634501215.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195757040 + ... + 196018467.

It is an arithmetic number, because the mean of its divisors is an integer number (9602123869449).

Almost surely, 2^{51210543621998} is an apocalyptic number.

51210543621998 is a deficient number, since it is larger than the sum of its proper divisors (25606447333594).

51210543621998 is a wasteful number, since it uses less digits than its factorization.

51210543621998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391840866.

The product of its (nonzero) digits is 4665600, while the sum is 56.

The spelling of 51210543621998 in words is "fifty-one trillion, two hundred ten billion, five hundred forty-three million, six hundred twenty-one thousand, nine hundred ninety-eight".