2651201644442 has 16 divisors (see below), whose sum is σ = 4299374602152. Its totient is φ = 1218870312960.

The previous prime is 2651201644439. The next prime is 2651201644447. The reversal of 2651201644442 is 2444461021562.

It can be written as a sum of positive squares in 4 ways, for example, as 2636171129641 + 15030514801 = 1623629^2 + 122599^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2651201644442.

It is not an unprimeable number, because it can be changed into a prime (2651201644447) 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, 198377159 + ... + 198390522.

Almost surely, 2^{2651201644442} is an apocalyptic number.

2651201644442 is a deficient number, since it is larger than the sum of its proper divisors (1648172957710).

2651201644442 is a wasteful number, since it uses less digits than its factorization.

2651201644442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396767953.

The product of its (nonzero) digits is 368640, while the sum is 41.

The spelling of 2651201644442 in words is "two trillion, six hundred fifty-one billion, two hundred one million, six hundred forty-four thousand, four hundred forty-two".