863772215039 has 16 divisors (see below), whose sum is σ = 890751974112. Its totient is φ = 837236994048.

The previous prime is 863772215029. The next prime is 863772215063. The reversal of 863772215039 is 930512277368.

It is a happy number.

It is not a de Polignac number, because 863772215039 - 2²⁸ = 863503779583 is a prime.

It is a super-3 number, since 3×863772215039³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863772215029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1603727 + ... + 2073519.

It is an arithmetic number, because the mean of its divisors is an integer number (55671998382).

Almost surely, 2^863772215039 is an apocalyptic number.

863772215039 is a deficient number, since it is larger than the sum of its proper divisors (26979759073).

863772215039 is a wasteful number, since it uses less digits than its factorization.

863772215039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470266.

The product of its (nonzero) digits is 3810240, while the sum is 53.

The spelling of 863772215039 in words is "eight hundred sixty-three billion, seven hundred seventy-two million, two hundred fifteen thousand, thirty-nine".