51511001601106 has 4 divisors (see below), whose sum is σ = 77266502401662. Its totient is φ = 25755500800552.

The previous prime is 51511001601097. The next prime is 51511001601229. The reversal of 51511001601106 is 60110610011515.

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

It can be written as a sum of positive squares in only one way, i.e., 44401445960481 + 7109555640625 = 6663441^2 + 2666375^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12877750400275 + ... + 12877750400278.

Almost surely, 2^{51511001601106} is an apocalyptic number.

51511001601106 is a deficient number, since it is larger than the sum of its proper divisors (25755500800556).

51511001601106 is a wasteful number, since it uses less digits than its factorization.

51511001601106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25755500800555.

The product of its (nonzero) digits is 900, while the sum is 28.

The spelling of 51511001601106 in words is "fifty-one trillion, five hundred eleven billion, one million, six hundred one thousand, one hundred six".