1954861965 has 32 divisors (see below), whose sum is σ = 3971784960. Its totient is φ = 893650752.

The previous prime is 1954861907. The next prime is 1954861967. The reversal of 1954861965 is 5691684591.

1954861965 is a `hidden beast` number, since 1 + 9 + 548 + 6 + 1 + 96 + 5 = 666.

It is not a de Polignac number, because 1954861965 - 2⁸ = 1954861709 is a prime.

It is a super-2 number, since 2×1954861965² = 7642970604407322450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1954861967) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1033374 + ... + 1035263.

It is an arithmetic number, because the mean of its divisors is an integer number (124118280).

Almost surely, 2^1954861965 is an apocalyptic number.

1954861965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1954861965 is an abundant number, since it is smaller than the sum of its proper divisors (2016922995).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1954861965 is a wasteful number, since it uses less digits than its factorization.

1954861965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2068658 (or 2068652 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 54.

The square root of 1954861965 is about 44213.8209726325. The cubic root of 1954861965 is about 1250.3704427402.

The spelling of 1954861965 in words is "one billion, nine hundred fifty-four million, eight hundred sixty-one thousand, nine hundred sixty-five".