78327537099 has 16 divisors (see below), whose sum is σ = 120471729408. Its totient is φ = 44340286752.

The previous prime is 78327537091. The next prime is 78327537109. The reversal of 78327537099 is 99073572387.

It is not a de Polignac number, because 78327537099 - 2³ = 78327537091 is a prime.

It is a super-2 number, since 2×78327537099² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78327537091) 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, 17427112 + ... + 17431605.

It is an arithmetic number, because the mean of its divisors is an integer number (7529483088).

Almost surely, 2^78327537099 is an apocalyptic number.

78327537099 is a deficient number, since it is larger than the sum of its proper divisors (42144192309).

78327537099 is a wasteful number, since it uses less digits than its factorization.

78327537099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34858834.

The product of its (nonzero) digits is 20003760, while the sum is 60.

The spelling of 78327537099 in words is "seventy-eight billion, three hundred twenty-seven million, five hundred thirty-seven thousand, ninety-nine".