51258961250 has 60 divisors (see below), whose sum is σ = 111766427982. Its totient is φ = 17574480000.

The previous prime is 51258961231. The next prime is 51258961267. The reversal of 51258961250 is 5216985215.

It can be written as a sum of positive squares in 5 ways, for example, as 482197681 + 50776763569 = 21959^2 + 225337^2 .

It is a super-2 number, since 2×51258961250² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 357191 + ... + 479690.

Almost surely, 2^51258961250 is an apocalyptic number.

51258961250 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51258961250 is an abundant number, since it is smaller than the sum of its proper divisors (60507466732).

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

51258961250 is an equidigital number, since it uses as much as digits as its factorization.

51258961250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836917 (or 836895 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 44.

The spelling of 51258961250 in words is "fifty-one billion, two hundred fifty-eight million, nine hundred sixty-one thousand, two hundred fifty".