6526978645 has 8 divisors (see below), whose sum is σ = 8544408480. Its totient is φ = 4746893520.

The previous prime is 6526978637. The next prime is 6526978681. The reversal of 6526978645 is 5468796256.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6526978645 - 2³ = 6526978637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6526978645.

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, 59336115 + ... + 59336224.

It is an arithmetic number, because the mean of its divisors is an integer number (1068051060).

Almost surely, 2^6526978645 is an apocalyptic number.

It is an amenable number.

6526978645 is a deficient number, since it is larger than the sum of its proper divisors (2017429835).

6526978645 is a wasteful number, since it uses less digits than its factorization.

6526978645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118672355.

The product of its digits is 21772800, while the sum is 58.

The square root of 6526978645 is about 80789.7186837533. The cubic root of 6526978645 is about 1868.8340167668.

The spelling of 6526978645 in words is "six billion, five hundred twenty-six million, nine hundred seventy-eight thousand, six hundred forty-five".