55581651407 has 16 divisors (see below), whose sum is σ = 57867823104. Its totient is φ = 53328132000.

The previous prime is 55581651361. The next prime is 55581651413. The reversal of 55581651407 is 70415618555.

It is a cyclic number.

It is not a de Polignac number, because 55581651407 - 2¹² = 55581647311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55581651497) 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, 1842278 + ... + 1872204.

It is an arithmetic number, because the mean of its divisors is an integer number (3616738944).

Almost surely, 2^55581651407 is an apocalyptic number.

55581651407 is a deficient number, since it is larger than the sum of its proper divisors (2286171697).

55581651407 is a wasteful number, since it uses less digits than its factorization.

55581651407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30470.

The product of its (nonzero) digits is 840000, while the sum is 47.

The spelling of 55581651407 in words is "fifty-five billion, five hundred eighty-one million, six hundred fifty-one thousand, four hundred seven".