55402167081 has 4 divisors (see below), whose sum is σ = 73869556112. Its totient is φ = 36934778052.

The previous prime is 55402167077. The next prime is 55402167091. The reversal of 55402167081 is 18076120455.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 55402167081 - 2² = 55402167077 is a prime.

It is a super-2 number, since 2×55402167081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55402167091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9233694511 + ... + 9233694516.

It is an arithmetic number, because the mean of its divisors is an integer number (18467389028).

Almost surely, 2^55402167081 is an apocalyptic number.

It is an amenable number.

55402167081 is a deficient number, since it is larger than the sum of its proper divisors (18467389031).

55402167081 is a wasteful number, since it uses less digits than its factorization.

55402167081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18467389030.

The product of its (nonzero) digits is 67200, while the sum is 39.

The spelling of 55402167081 in words is "fifty-five billion, four hundred two million, one hundred sixty-seven thousand, eighty-one".