15958055961 has 6 divisors (see below), whose sum is σ = 23050525290. Its totient is φ = 10638703968.

The previous prime is 15958055959. The next prime is 15958055963. The reversal of 15958055961 is 16955085951.

15958055961 is a `hidden beast` number, since 1 + 5 + 9 + 5 + 80 + 559 + 6 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (15958055959) and next prime (15958055963).

It can be written as a sum of positive squares in only one way, i.e., 12886790400 + 3071265561 = 113520^2 + 55419^2 .

It is not a de Polignac number, because 15958055961 - 2¹ = 15958055959 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15958055898 and 15958055907.

It is not an unprimeable number, because it can be changed into a prime (15958055963) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 886558656 + ... + 886558673.

It is an arithmetic number, because the mean of its divisors is an integer number (3841754215).

Almost surely, 2^15958055961 is an apocalyptic number.

It is an amenable number.

15958055961 is a deficient number, since it is larger than the sum of its proper divisors (7092469329).

15958055961 is a wasteful number, since it uses less digits than its factorization.

15958055961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1773117335 (or 1773117332 counting only the distinct ones).

The product of its (nonzero) digits is 2430000, while the sum is 54.

The spelling of 15958055961 in words is "fifteen billion, nine hundred fifty-eight million, fifty-five thousand, nine hundred sixty-one".