70120050561561 has 64 divisors (see below), whose sum is σ = 125556003901440. Its totient is φ = 33616928067840.

The previous prime is 70120050561557. The next prime is 70120050561577. The reversal of 70120050561561 is 16516505002107.

It is a happy number.

It is not a de Polignac number, because 70120050561561 - 2² = 70120050561557 is a prime.

It is a super-3 number, since 3×70120050561561³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (70120050561511) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11838031 + ... + 16744523.

It is an arithmetic number, because the mean of its divisors is an integer number (1961812560960).

Almost surely, 2^{70120050561561} is an apocalyptic number.

It is an amenable number.

70120050561561 is a deficient number, since it is larger than the sum of its proper divisors (55435953339879).

70120050561561 is a wasteful number, since it uses less digits than its factorization.

70120050561561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4911286.

The product of its (nonzero) digits is 63000, while the sum is 39.

Adding to 70120050561561 its reverse (16516505002107), we get a palindrome (86636555563668).

The spelling of 70120050561561 in words is "seventy trillion, one hundred twenty billion, fifty million, five hundred sixty-one thousand, five hundred sixty-one".