651711216106 has 4 divisors (see below), whose sum is σ = 977566824162. Its totient is φ = 325855608052.

The previous prime is 651711216073. The next prime is 651711216139. The reversal of 651711216106 is 601612117156.

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

It is an interprime number because it is at equal distance from previous prime (651711216073) and next prime (651711216139).

It can be written as a sum of positive squares in only one way, i.e., 649057420881 + 2653795225 = 805641^2 + 51515^2 .

It is a super-2 number, since 2×651711216106² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162927804025 + ... + 162927804028.

Almost surely, 2^651711216106 is an apocalyptic number.

651711216106 is a deficient number, since it is larger than the sum of its proper divisors (325855608056).

651711216106 is a wasteful number, since it uses less digits than its factorization.

651711216106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325855608055.

The product of its (nonzero) digits is 15120, while the sum is 37.

The spelling of 651711216106 in words is "six hundred fifty-one billion, seven hundred eleven million, two hundred sixteen thousand, one hundred six".