2904918001861 has 2 divisors, whose sum is σ = 2904918001862. Its totient is φ = 2904918001860.

The previous prime is 2904918001841. The next prime is 2904918001897. The reversal of 2904918001861 is 1681008194092.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2316773189025 + 588144812836 = 1522095^2 + 766906^2 .

It is a cyclic number.

It is not a de Polignac number, because 2904918001861 - 2⁵ = 2904918001829 is a prime.

It is a super-2 number, since 2×2904918001861² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2904918001841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1452459000930 + 1452459000931.

It is an arithmetic number, because the mean of its divisors is an integer number (1452459000931).

Almost surely, 2^{2904918001861} is an apocalyptic number.

It is an amenable number.

2904918001861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2904918001861 is an equidigital number, since it uses as much as digits as its factorization.

2904918001861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 49.

The spelling of 2904918001861 in words is "two trillion, nine hundred four billion, nine hundred eighteen million, one thousand, eight hundred sixty-one".