51542785154 has 32 divisors (see below), whose sum is σ = 93741957120. Its totient is φ = 20762351568.

The previous prime is 51542785153. The next prime is 51542785169. The reversal of 51542785154 is 45158724515.

It is a junction number, because it is equal to n+sod(n) for n = 51542785099 and 51542785108.

It is not an unprimeable number, because it can be changed into a prime (51542785153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 729092 + ... + 796655.

It is an arithmetic number, because the mean of its divisors is an integer number (2929436160).

Almost surely, 2^51542785154 is an apocalyptic number.

51542785154 is a deficient number, since it is larger than the sum of its proper divisors (42199171966).

51542785154 is a wasteful number, since it uses less digits than its factorization.

51542785154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1525902.

The product of its digits is 1120000, while the sum is 47.

The spelling of 51542785154 in words is "fifty-one billion, five hundred forty-two million, seven hundred eighty-five thousand, one hundred fifty-four".