51425491040 has 192 divisors, whose sum is σ = 151624908288. Its totient is φ = 16012492800.

The previous prime is 51425491037. The next prime is 51425491043. The reversal of 51425491040 is 4019452415.

51425491040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51425491037) and next prime (51425491043).

It is a super-2 number, since 2×51425491040² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51425491043) 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, 19353392 + ... + 19356048.

It is an arithmetic number, because the mean of its divisors is an integer number (789713064).

Almost surely, 2^51425491040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51425491040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75812454144).

51425491040 is an abundant number, since it is smaller than the sum of its proper divisors (100199417248).

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

51425491040 is a wasteful number, since it uses less digits than its factorization.

51425491040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4261 (or 4253 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The spelling of 51425491040 in words is "fifty-one billion, four hundred twenty-five million, four hundred ninety-one thousand, forty".