51290497660 has 24 divisors (see below), whose sum is σ = 107777557440. Its totient is φ = 20503339584.

The previous prime is 51290497613. The next prime is 51290497669. The reversal of 51290497660 is 6679409215.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51290497669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 770980 + ... + 834859.

It is an arithmetic number, because the mean of its divisors is an integer number (4490731560).

Almost surely, 2^51290497660 is an apocalyptic number.

It is an amenable number.

51290497660 is an abundant number, since it is smaller than the sum of its proper divisors (56487059780).

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

51290497660 is a wasteful number, since it uses less digits than its factorization.

51290497660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1607445 (or 1607443 counting only the distinct ones).

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

The spelling of 51290497660 in words is "fifty-one billion, two hundred ninety million, four hundred ninety-seven thousand, six hundred sixty".