445404236401561 has 8 divisors (see below), whose sum is σ = 447365395643400. Its totient is φ = 443443217704320.

The previous prime is 445404236401519. The next prime is 445404236401573. The reversal of 445404236401561 is 165104632404544.

It can be written as a sum of positive squares in 4 ways, for example, as 125950813373961 + 319453423027600 = 11222781^2 + 17873260^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 445404236401561 - 2¹⁷ = 445404236270489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (445404236401591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28781410 + ... + 41462971.

It is an arithmetic number, because the mean of its divisors is an integer number (55920674455425).

Almost surely, 2^{445404236401561} is an apocalyptic number.

It is an amenable number.

445404236401561 is a deficient number, since it is larger than the sum of its proper divisors (1961159241839).

445404236401561 is a wasteful number, since it uses less digits than its factorization.

445404236401561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70272299.

The product of its (nonzero) digits is 5529600, while the sum is 49.

The spelling of 445404236401561 in words is "four hundred forty-five trillion, four hundred four billion, two hundred thirty-six million, four hundred one thousand, five hundred sixty-one".