2148906761 has 8 divisors (see below), whose sum is σ = 2154305160. Its totient is φ = 2143516672.

The previous prime is 2148906737. The next prime is 2148906817. The reversal of 2148906761 is 1676098412.

It can be written as a sum of positive squares in 4 ways, for example, as 266995600 + 1881911161 = 16340^2 + 43381^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2148906761 is a prime.

It is a super-2 number, since 2×2148906761² = 9235600534943022242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2148906731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1088171 + ... + 1090143.

It is an arithmetic number, because the mean of its divisors is an integer number (269288145).

Almost surely, 2^2148906761 is an apocalyptic number.

It is an amenable number.

2148906761 is a deficient number, since it is larger than the sum of its proper divisors (5398399).

2148906761 is a wasteful number, since it uses less digits than its factorization.

2148906761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4155.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 2148906761 is about 46356.3022791939. The cubic root of 2148906761 is about 1290.4440834304. Note that the first 3 decimals are identical.

The spelling of 2148906761 in words is "two billion, one hundred forty-eight million, nine hundred six thousand, seven hundred sixty-one".