2151154256642 has 16 divisors (see below), whose sum is σ = 3281515009920. Its totient is φ = 1057316956368.

The previous prime is 2151154256627. The next prime is 2151154256663. The reversal of 2151154256642 is 2466524511512.

It is a super-2 number, since 2×2151154256642² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2151154256593 and 2151154256602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4240028 + ... + 4720184.

It is an arithmetic number, because the mean of its divisors is an integer number (205094688120).

Almost surely, 2^{2151154256642} is an apocalyptic number.

2151154256642 is a deficient number, since it is larger than the sum of its proper divisors (1130360753278).

2151154256642 is a wasteful number, since it uses less digits than its factorization.

2151154256642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518185.

The product of its digits is 576000, while the sum is 44.

The spelling of 2151154256642 in words is "two trillion, one hundred fifty-one billion, one hundred fifty-four million, two hundred fifty-six thousand, six hundred forty-two".