2978204645571 has 16 divisors (see below), whose sum is σ = 4222569390624. Its totient is φ = 1860657342464.

The previous prime is 2978204645561. The next prime is 2978204645587. The reversal of 2978204645571 is 1755464028792.

It is a cyclic number.

It is not a de Polignac number, because 2978204645571 - 2¹³ = 2978204637379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2978204645551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125301786 + ... + 125325551.

It is an arithmetic number, because the mean of its divisors is an integer number (263910586914).

Almost surely, 2^{2978204645571} is an apocalyptic number.

2978204645571 is a deficient number, since it is larger than the sum of its proper divisors (1244364745053).

2978204645571 is a wasteful number, since it uses less digits than its factorization.

2978204645571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250627590.

The product of its (nonzero) digits is 33868800, while the sum is 60.

The spelling of 2978204645571 in words is "two trillion, nine hundred seventy-eight billion, two hundred four million, six hundred forty-five thousand, five hundred seventy-one".