51027770220504 has 128 divisors (see below), whose sum is σ = 162048493831680. Its totient is φ = 13003891430400.

The previous prime is 51027770220503. The next prime is 51027770220509. The reversal of 51027770220504 is 40502207772015.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51027770220503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 260396677 + ... + 260592564.

It is an arithmetic number, because the mean of its divisors is an integer number (1266003858060).

Almost surely, 2^{51027770220504} is an apocalyptic number.

It is an amenable number.

51027770220504 is an abundant number, since it is smaller than the sum of its proper divisors (111020723611176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51027770220504 is a wasteful number, since it uses less digits than its factorization.

51027770220504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520989321 (or 520989317 counting only the distinct ones).

The product of its (nonzero) digits is 274400, while the sum is 42.

Adding to 51027770220504 its reverse (40502207772015), we get a palindrome (91529977992519).

The spelling of 51027770220504 in words is "fifty-one trillion, twenty-seven billion, seven hundred seventy million, two hundred twenty thousand, five hundred four".