261542450654 has 8 divisors (see below), whose sum is σ = 409370792400. Its totient is φ = 125085519856.

The previous prime is 261542450651. The next prime is 261542450711. The reversal of 261542450654 is 456054245162.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261542450651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2842852679 + ... + 2842852770.

It is an arithmetic number, because the mean of its divisors is an integer number (51171349050).

Almost surely, 2^261542450654 is an apocalyptic number.

261542450654 is a deficient number, since it is larger than the sum of its proper divisors (147828341746).

261542450654 is a wasteful number, since it uses less digits than its factorization.

261542450654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5685705474.

The product of its (nonzero) digits is 1152000, while the sum is 44.

The spelling of 261542450654 in words is "two hundred sixty-one billion, five hundred forty-two million, four hundred fifty thousand, six hundred fifty-four".