1954123216 has 10 divisors (see below), whose sum is σ = 3786113762. Its totient is φ = 977061600.

The previous prime is 1954123189. The next prime is 1954123271. The reversal of 1954123216 is 6123214591.

It can be written as a sum of positive squares in only one way, i.e., 1953993616 + 129600 = 44204^2 + 360^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61066335 + ... + 61066366.

Almost surely, 2^1954123216 is an apocalyptic number.

1954123216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1954123216 is a deficient number, since it is larger than the sum of its proper divisors (1831990546).

1954123216 is a wasteful number, since it uses less digits than its factorization.

1954123216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122132709 (or 122132703 counting only the distinct ones).

The product of its digits is 12960, while the sum is 34.

The square root of 1954123216 is about 44205.4659063786. The cubic root of 1954123216 is about 1250.2129164779.

The spelling of 1954123216 in words is "one billion, nine hundred fifty-four million, one hundred twenty-three thousand, two hundred sixteen".