51148440042 has 16 divisors (see below), whose sum is σ = 116910720192. Its totient is φ = 14613840000.

The previous prime is 51148439989. The next prime is 51148440047. The reversal of 51148440042 is 24004484115.

It is a junction number, because it is equal to n+sod(n) for n = 51148439985 and 51148440012.

It is not an unprimeable number, because it can be changed into a prime (51148440047) 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, 608909959 + ... + 608910042.

It is an arithmetic number, because the mean of its divisors is an integer number (7306920012).

Almost surely, 2^51148440042 is an apocalyptic number.

51148440042 is an abundant number, since it is smaller than the sum of its proper divisors (65762280150).

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

51148440042 is a wasteful number, since it uses less digits than its factorization.

51148440042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217820013.

The product of its (nonzero) digits is 20480, while the sum is 33.

The spelling of 51148440042 in words is "fifty-one billion, one hundred forty-eight million, four hundred forty thousand, forty-two".