51440269247990 has 128 divisors (see below), whose sum is σ = 106780716564480. Its totient is φ = 17477381923200.

The previous prime is 51440269247947. The next prime is 51440269248001. The reversal of 51440269247990 is 9974296204415.

It is a super-2 number, since 2×51440269247990² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5461325501 + ... + 5461334919.

It is an arithmetic number, because the mean of its divisors is an integer number (834224348160).

Almost surely, 2^{51440269247990} is an apocalyptic number.

51440269247990 is an abundant number, since it is smaller than the sum of its proper divisors (55340447316490).

51440269247990 is a wasteful number, since it uses less digits than its factorization.

51440269247990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11218.

The product of its (nonzero) digits is 39191040, while the sum is 62.

The spelling of 51440269247990 in words is "fifty-one trillion, four hundred forty billion, two hundred sixty-nine million, two hundred forty-seven thousand, nine hundred ninety".