978651652711 has 4 divisors (see below), whose sum is σ = 1021201724592. Its totient is φ = 936101580832.

The previous prime is 978651652703. The next prime is 978651652721. The reversal of 978651652711 is 117256156879.

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

It is a cyclic number.

It is not a de Polignac number, because 978651652711 - 2³ = 978651652703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978651652721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21275035906 + ... + 21275035951.

It is an arithmetic number, because the mean of its divisors is an integer number (255300431148).

Almost surely, 2^978651652711 is an apocalyptic number.

978651652711 is a deficient number, since it is larger than the sum of its proper divisors (42550071881).

978651652711 is a wasteful number, since it uses less digits than its factorization.

978651652711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42550071880.

The product of its digits is 6350400, while the sum is 58.

The spelling of 978651652711 in words is "nine hundred seventy-eight billion, six hundred fifty-one million, six hundred fifty-two thousand, seven hundred eleven".