640254156146 has 16 divisors (see below), whose sum is σ = 1049603974560. Its totient is φ = 290492573280.

The previous prime is 640254156067. The next prime is 640254156151. The reversal of 640254156146 is 641651452046.

It is a super-3 number, since 3×640254156146³ (a number of 36 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 640254156097 and 640254156106.

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, 26589851 + ... + 26613918.

It is an arithmetic number, because the mean of its divisors is an integer number (65600248410).

Almost surely, 2^640254156146 is an apocalyptic number.

640254156146 is a deficient number, since it is larger than the sum of its proper divisors (409349818414).

640254156146 is a wasteful number, since it uses less digits than its factorization.

640254156146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53204329.

The product of its (nonzero) digits is 691200, while the sum is 44.

The spelling of 640254156146 in words is "six hundred forty billion, two hundred fifty-four million, one hundred fifty-six thousand, one hundred forty-six".