51015021671654 has 4 divisors (see below), whose sum is σ = 76522532507484. Its totient is φ = 25507510835826.

The previous prime is 51015021671651. The next prime is 51015021671681. The reversal of 51015021671654 is 45617612051015.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51015021671651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12753755417912 + ... + 12753755417915.

It is an arithmetic number, because the mean of its divisors is an integer number (19130633126871).

Almost surely, 2^{51015021671654} is an apocalyptic number.

51015021671654 is a deficient number, since it is larger than the sum of its proper divisors (25507510835830).

51015021671654 is a wasteful number, since it uses less digits than its factorization.

51015021671654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25507510835829.

The product of its (nonzero) digits is 252000, while the sum is 44.

The spelling of 51015021671654 in words is "fifty-one trillion, fifteen billion, twenty-one million, six hundred seventy-one thousand, six hundred fifty-four".