64278212158 has 16 divisors (see below), whose sum is σ = 97009274880. Its totient is φ = 31941845496.

The previous prime is 64278212123. The next prime is 64278212183. The reversal of 64278212158 is 85121287246.

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, 3431863 + ... + 3450541.

It is an arithmetic number, because the mean of its divisors is an integer number (6063079680).

Almost surely, 2^64278212158 is an apocalyptic number.

64278212158 is a deficient number, since it is larger than the sum of its proper divisors (32731062722).

64278212158 is a wasteful number, since it uses less digits than its factorization.

64278212158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29151.

The product of its digits is 430080, while the sum is 46.

It can be divided in two parts, 642782 and 12158, that added together give a triangular number (654940 = T₁₁₄₄).

The spelling of 64278212158 in words is "sixty-four billion, two hundred seventy-eight million, two hundred twelve thousand, one hundred fifty-eight".