264515006778 has 32 divisors (see below), whose sum is σ = 607498583040. Its totient is φ = 75937322160.

The previous prime is 264515006747. The next prime is 264515006809. The reversal of 264515006778 is 877600515462.

It is an interprime number because it is at equal distance from previous prime (264515006747) and next prime (264515006809).

It is a self number, because there is not a number n which added to its sum of digits gives 264515006778.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105467250 + ... + 105469757.

It is an arithmetic number, because the mean of its divisors is an integer number (18984330720).

Almost surely, 2^264515006778 is an apocalyptic number.

264515006778 is an abundant number, since it is smaller than the sum of its proper divisors (342983576262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

264515006778 is a wasteful number, since it uses less digits than its factorization.

264515006778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210937042.

The product of its (nonzero) digits is 2822400, while the sum is 51.

The spelling of 264515006778 in words is "two hundred sixty-four billion, five hundred fifteen million, six thousand, seven hundred seventy-eight".