1385611965 has 24 divisors (see below), whose sum is σ = 2405490048. Its totient is φ = 737835360.

The previous prime is 1385611963. The next prime is 1385611973. The reversal of 1385611965 is 5691165831.

1385611965 is a `hidden beast` number, since 13 + 8 + 561 + 19 + 65 = 666.

It is not a de Polignac number, because 1385611965 - 2¹ = 1385611963 is a prime.

It is a super-2 number, since 2×1385611965² = 3839841035102322450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1385611965.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1385611963) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5320 + ... + 52910.

It is an arithmetic number, because the mean of its divisors is an integer number (100228752).

Almost surely, 2^1385611965 is an apocalyptic number.

1385611965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1385611965 is a deficient number, since it is larger than the sum of its proper divisors (1019878083).

1385611965 is a wasteful number, since it uses less digits than its factorization.

1385611965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48249 (or 48246 counting only the distinct ones).

The product of its digits is 194400, while the sum is 45.

The square root of 1385611965 is about 37223.8091145976. The cubic root of 1385611965 is about 1114.8434201354.

The spelling of 1385611965 in words is "one billion, three hundred eighty-five million, six hundred eleven thousand, nine hundred sixty-five".