1385097261644 has 24 divisors (see below), whose sum is σ = 2553148765440. Its totient is φ = 655673437584.

The previous prime is 1385097261617. The next prime is 1385097261671. The reversal of 1385097261644 is 4461627905831.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1385097261617) and next prime (1385097261671).

It is a self number, because there is not a number n which added to its sum of digits gives 1385097261644.

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, 5788424 + ... + 6022959.

It is an arithmetic number, because the mean of its divisors is an integer number (106381198560).

It is a 1-persistent number, because it is pandigital, but 2⋅1385097261644 = 2770194523288 is not.

Almost surely, 2^{1385097261644} is an apocalyptic number.

It is an amenable number.

1385097261644 is a deficient number, since it is larger than the sum of its proper divisors (1168051503796).

1385097261644 is a wasteful number, since it uses less digits than its factorization.

1385097261644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11812949 (or 11812947 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 56.

The spelling of 1385097261644 in words is "one trillion, three hundred eighty-five billion, ninety-seven million, two hundred sixty-one thousand, six hundred forty-four".