1265101616 has 10 divisors (see below), whose sum is σ = 2451134412. Its totient is φ = 632550800.

The previous prime is 1265101613. The next prime is 1265101619. The reversal of 1265101616 is 6161015621.

It is an interprime number because it is at equal distance from previous prime (1265101613) and next prime (1265101619).

It is a super-2 number, since 2×1265101616² = 3200964197611622912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1265101613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39534410 + ... + 39534441.

Almost surely, 2^1265101616 is an apocalyptic number.

1265101616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1265101616 is a deficient number, since it is larger than the sum of its proper divisors (1186032796).

1265101616 is an equidigital number, since it uses as much as digits as its factorization.

1265101616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79068859 (or 79068853 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 1265101616 is about 35568.2669805545. The cubic root of 1265101616 is about 1081.5380509303.

The spelling of 1265101616 in words is "one billion, two hundred sixty-five million, one hundred one thousand, six hundred sixteen".