55154131990 has 16 divisors (see below), whose sum is σ = 101389724352. Its totient is φ = 21592255744.

The previous prime is 55154131973. The next prime is 55154132017. The reversal of 55154131990 is 9913145155.

It is a super-3 number, since 3×55154131990³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58674139 + ... + 58675078.

It is an arithmetic number, because the mean of its divisors is an integer number (6336857772).

Almost surely, 2^55154131990 is an apocalyptic number.

55154131990 is a deficient number, since it is larger than the sum of its proper divisors (46235592362).

55154131990 is a wasteful number, since it uses less digits than its factorization.

55154131990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117349271.

The product of its (nonzero) digits is 121500, while the sum is 43.

The spelling of 55154131990 in words is "fifty-five billion, one hundred fifty-four million, one hundred thirty-one thousand, nine hundred ninety".