51429320040 has 192 divisors, whose sum is σ = 190035720000. Its totient is φ = 11063764992.

The previous prime is 51429320021. The next prime is 51429320053. The reversal of 51429320040 is 4002392415.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 157290 + ... + 357209.

It is an arithmetic number, because the mean of its divisors is an integer number (989769375).

Almost surely, 2^51429320040 is an apocalyptic number.

It is an amenable number.

51429320040 is an abundant number, since it is smaller than the sum of its proper divisors (138606399960).

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

51429320040 is a wasteful number, since it uses less digits than its factorization.

51429320040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514544 (or 514533 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The spelling of 51429320040 in words is "fifty-one billion, four hundred twenty-nine million, three hundred twenty thousand, forty".