51167161556 has 24 divisors (see below), whose sum is σ = 102819331776. Its totient is φ = 21824853120.

The previous prime is 51167161541. The next prime is 51167161627. The reversal of 51167161556 is 65516176115.

It is a happy number.

It is a super-2 number, since 2×51167161556² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4324421 + ... + 4336236.

It is an arithmetic number, because the mean of its divisors is an integer number (4284138824).

Almost surely, 2^51167161556 is an apocalyptic number.

It is an amenable number.

51167161556 is an abundant number, since it is smaller than the sum of its proper divisors (51652170220).

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

51167161556 is a wasteful number, since it uses less digits than its factorization.

51167161556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8660879 (or 8660877 counting only the distinct ones).

The product of its digits is 189000, while the sum is 44.

The spelling of 51167161556 in words is "fifty-one billion, one hundred sixty-seven million, one hundred sixty-one thousand, five hundred fifty-six".