1954117766 has 16 divisors (see below), whose sum is σ = 3059563104. Its totient is φ = 934289664.

The previous prime is 1954117733. The next prime is 1954117777. The reversal of 1954117766 is 6677114591.

It is a self number, because there is not a number n which added to its sum of digits gives 1954117766.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 265796 + ... + 273048.

It is an arithmetic number, because the mean of its divisors is an integer number (191222694).

Almost surely, 2^1954117766 is an apocalyptic number.

1954117766 is a deficient number, since it is larger than the sum of its proper divisors (1105445338).

1954117766 is a wasteful number, since it uses less digits than its factorization.

1954117766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13135.

The product of its digits is 317520, while the sum is 47.

The square root of 1954117766 is about 44205.4042623750. The cubic root of 1954117766 is about 1250.2117542061.

The spelling of 1954117766 in words is "one billion, nine hundred fifty-four million, one hundred seventeen thousand, seven hundred sixty-six".