51155525454 has 16 divisors (see below), whose sum is σ = 111612055680. Its totient is φ = 15501674360.

The previous prime is 51155525437. The next prime is 51155525459. The reversal of 51155525454 is 45452555115.

It is a happy number.

It is a super-2 number, since 2×51155525454² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51155525459) 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, 387541794 + ... + 387541925.

It is an arithmetic number, because the mean of its divisors is an integer number (6975753480).

Almost surely, 2^51155525454 is an apocalyptic number.

51155525454 is an abundant number, since it is smaller than the sum of its proper divisors (60456530226).

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

51155525454 is a wasteful number, since it uses less digits than its factorization.

51155525454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775083735.

The product of its digits is 500000, while the sum is 42.

The spelling of 51155525454 in words is "fifty-one billion, one hundred fifty-five million, five hundred twenty-five thousand, four hundred fifty-four".