205511246102 has 4 divisors (see below), whose sum is σ = 308266869156. Its totient is φ = 102755623050.

The previous prime is 205511246099. The next prime is 205511246131. The reversal of 205511246102 is 201642115502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 201642115502 = 2 ⋅100821057751.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51377811524 + ... + 51377811527.

It is an arithmetic number, because the mean of its divisors is an integer number (77066717289).

Almost surely, 2^205511246102 is an apocalyptic number.

205511246102 is a deficient number, since it is larger than the sum of its proper divisors (102755623054).

205511246102 is a wasteful number, since it uses less digits than its factorization.

205511246102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102755623053.

The product of its (nonzero) digits is 4800, while the sum is 29.

The spelling of 205511246102 in words is "two hundred five billion, five hundred eleven million, two hundred forty-six thousand, one hundred two".