980651861 has 16 divisors (see below), whose sum is σ = 1168849920. Its totient is φ = 805040640.

The previous prime is 980651857. The next prime is 980651869. The reversal of 980651861 is 168156089.

It is a cyclic number.

It is not a de Polignac number, because 980651861 - 2² = 980651857 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (980651869) 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, 2246 + ... + 44343.

It is an arithmetic number, because the mean of its divisors is an integer number (73053120).

Almost surely, 2^980651861 is an apocalyptic number.

It is an amenable number.

980651861 is a deficient number, since it is larger than the sum of its proper divisors (188198059).

980651861 is a wasteful number, since it uses less digits than its factorization.

980651861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46724.

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 980651861 is about 31315.3614221519. The cubic root of 980651861 is about 993.5085728873.

The spelling of 980651861 in words is "nine hundred eighty million, six hundred fifty-one thousand, eight hundred sixty-one".