51621300454 has 16 divisors (see below), whose sum is σ = 78173169120. Its totient is φ = 25564746240.

The previous prime is 51621300449. The next prime is 51621300463. The reversal of 51621300454 is 45400312615.

It is a happy number.

It is a super-2 number, since 2×51621300454² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203602 + ... + 380389.

It is an arithmetic number, because the mean of its divisors is an integer number (4885823070).

Almost surely, 2^51621300454 is an apocalyptic number.

51621300454 is a deficient number, since it is larger than the sum of its proper divisors (26551868666).

51621300454 is a wasteful number, since it uses less digits than its factorization.

51621300454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584415.

The product of its (nonzero) digits is 14400, while the sum is 31.

The spelling of 51621300454 in words is "fifty-one billion, six hundred twenty-one million, three hundred thousand, four hundred fifty-four".