84820187961 has 32 divisors (see below), whose sum is σ = 132478156800. Its totient is φ = 53487637200.

The previous prime is 84820187929. The next prime is 84820187971. The reversal of 84820187961 is 16978102848.

It is not a de Polignac number, because 84820187961 - 2⁵ = 84820187929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 84820187898 and 84820187907.

It is not an unprimeable number, because it can be changed into a prime (84820187971) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 204136 + ... + 459686.

It is an arithmetic number, because the mean of its divisors is an integer number (4139942400).

Almost surely, 2^84820187961 is an apocalyptic number.

It is an amenable number.

84820187961 is a deficient number, since it is larger than the sum of its proper divisors (47657968839).

84820187961 is a wasteful number, since it uses less digits than its factorization.

84820187961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256226 (or 256220 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 54.

The spelling of 84820187961 in words is "eighty-four billion, eight hundred twenty million, one hundred eighty-seven thousand, nine hundred sixty-one".