1217670072765 has 16 divisors (see below), whose sum is σ = 1975712570496. Its totient is φ = 640277220800.

The previous prime is 1217670072757. The next prime is 1217670072781. The reversal of 1217670072765 is 5672700767121.

It is not a de Polignac number, because 1217670072765 - 2³ = 1217670072757 is a prime.

It is a super-2 number, since 2×1217670072765² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 571675026 + ... + 571677155.

It is an arithmetic number, because the mean of its divisors is an integer number (123482035656).

Almost surely, 2^{1217670072765} is an apocalyptic number.

1217670072765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1217670072765 is a deficient number, since it is larger than the sum of its proper divisors (758042497731).

1217670072765 is a wasteful number, since it uses less digits than its factorization.

1217670072765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1143352260.

The product of its (nonzero) digits is 1728720, while the sum is 51.

The spelling of 1217670072765 in words is "one trillion, two hundred seventeen billion, six hundred seventy million, seventy-two thousand, seven hundred sixty-five".