86955199778 has 16 divisors (see below), whose sum is σ = 137305072320. Its totient is φ = 41187088656.

The previous prime is 86955199769. The next prime is 86955199787. The reversal of 86955199778 is 87799155968.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (86955199769) and next prime (86955199787).

It is a super-2 number, since 2×86955199778² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 816500 + ... + 916832.

It is an arithmetic number, because the mean of its divisors is an integer number (8581567020).

Almost surely, 2^86955199778 is an apocalyptic number.

86955199778 is a deficient number, since it is larger than the sum of its proper divisors (50349872542).

86955199778 is a wasteful number, since it uses less digits than its factorization.

86955199778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123161.

The product of its digits is 342921600, while the sum is 74.

The spelling of 86955199778 in words is "eighty-six billion, nine hundred fifty-five million, one hundred ninety-nine thousand, seven hundred seventy-eight".