55179521947 has 48 divisors (see below), whose sum is σ = 63995688736. Its totient is φ = 47489587200.

The previous prime is 55179521939. The next prime is 55179521953. The reversal of 55179521947 is 74912597155.

It is not a de Polignac number, because 55179521947 - 2³ = 55179521939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55179521977) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26489368 + ... + 26491450.

Almost surely, 2^55179521947 is an apocalyptic number.

55179521947 is a deficient number, since it is larger than the sum of its proper divisors (8816166789).

55179521947 is a wasteful number, since it uses less digits than its factorization.

55179521947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2300 (or 2289 counting only the distinct ones).

The product of its digits is 3969000, while the sum is 55.

The spelling of 55179521947 in words is "fifty-five billion, one hundred seventy-nine million, five hundred twenty-one thousand, nine hundred forty-seven".