51027770220646 has 16 divisors (see below), whose sum is σ = 77269091310576. Its totient is φ = 25272547527136.

The previous prime is 51027770220611. The next prime is 51027770220649. The reversal of 51027770220646 is 64602207772015.

It is a super-3 number, since 3×51027770220646³ (a number of 42 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51027770220646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51027770220649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285179521 + ... + 285358396.

It is an arithmetic number, because the mean of its divisors is an integer number (4829318206911).

Almost surely, 2^{51027770220646} is an apocalyptic number.

51027770220646 is a deficient number, since it is larger than the sum of its proper divisors (26241321089930).

51027770220646 is a wasteful number, since it uses less digits than its factorization.

51027770220646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570538343.

The product of its (nonzero) digits is 1975680, while the sum is 49.

The spelling of 51027770220646 in words is "fifty-one trillion, twenty-seven billion, seven hundred seventy million, two hundred twenty thousand, six hundred forty-six".