2564470415278 has 4 divisors (see below), whose sum is σ = 3846705622920. Its totient is φ = 1282235207638.

The previous prime is 2564470415263. The next prime is 2564470415323. The reversal of 2564470415278 is 8725140744652.

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

It is a super-2 number, since 2×2564470415278² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 641117603818 + ... + 641117603821.

It is an arithmetic number, because the mean of its divisors is an integer number (961676405730).

Almost surely, 2^{2564470415278} is an apocalyptic number.

2564470415278 is a deficient number, since it is larger than the sum of its proper divisors (1282235207642).

2564470415278 is a wasteful number, since it uses less digits than its factorization.

2564470415278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282235207641.

The product of its (nonzero) digits is 15052800, while the sum is 55.

The spelling of 2564470415278 in words is "two trillion, five hundred sixty-four billion, four hundred seventy million, four hundred fifteen thousand, two hundred seventy-eight".