51146947390 has 64 divisors (see below), whose sum is σ = 114858777600. Its totient is φ = 15931203840.

The previous prime is 51146947351. The next prime is 51146947393. The reversal of 51146947390 is 9374964115.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51146947393) 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, 1166586 + ... + 1209634.

It is an arithmetic number, because the mean of its divisors is an integer number (1794668400).

Almost surely, 2^51146947390 is an apocalyptic number.

51146947390 is an abundant number, since it is smaller than the sum of its proper divisors (63711830210).

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

51146947390 is a wasteful number, since it uses less digits than its factorization.

51146947390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44617.

The product of its (nonzero) digits is 816480, while the sum is 49.

The spelling of 51146947390 in words is "fifty-one billion, one hundred forty-six million, nine hundred forty-seven thousand, three hundred ninety".