42551620621345 has 16 divisors (see below), whose sum is σ = 57624765232320. Its totient is φ = 29879507896000.

The previous prime is 42551620621337. The next prime is 42551620621351. The reversal of 42551620621345 is 54312602615524.

It is not a de Polignac number, because 42551620621345 - 2³ = 42551620621337 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42551620621295 and 42551620621304.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13339064431 + ... + 13339067620.

It is an arithmetic number, because the mean of its divisors is an integer number (3601547827020).

Almost surely, 2^{42551620621345} is an apocalyptic number.

It is an amenable number.

42551620621345 is a deficient number, since it is larger than the sum of its proper divisors (15073144610975).

42551620621345 is a wasteful number, since it uses less digits than its factorization.

42551620621345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26678132096.

The product of its (nonzero) digits is 1728000, while the sum is 46.

The spelling of 42551620621345 in words is "forty-two trillion, five hundred fifty-one billion, six hundred twenty million, six hundred twenty-one thousand, three hundred forty-five".