2061520655631 has 16 divisors (see below), whose sum is σ = 2754750720384. Its totient is φ = 1371320859744.

The previous prime is 2061520655617. The next prime is 2061520655659. The reversal of 2061520655631 is 1365560251602.

It is not a de Polignac number, because 2061520655631 - 2¹⁴ = 2061520639247 is a prime.

It is a super-2 number, since 2×2061520655631² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2061520655671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3872316 + ... + 4372398.

It is an arithmetic number, because the mean of its divisors is an integer number (172171920024).

Almost surely, 2^{2061520655631} is an apocalyptic number.

2061520655631 is a deficient number, since it is larger than the sum of its proper divisors (693230064753).

2061520655631 is a wasteful number, since it uses less digits than its factorization.

2061520655631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503110.

The product of its (nonzero) digits is 324000, while the sum is 42.

The spelling of 2061520655631 in words is "two trillion, sixty-one billion, five hundred twenty million, six hundred fifty-five thousand, six hundred thirty-one".