61451761534 has 16 divisors (see below), whose sum is σ = 97684567488. Its totient is φ = 28893376512.

The previous prime is 61451761513. The next prime is 61451761543. The reversal of 61451761534 is 43516715416.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 744582 + ... + 822985.

It is an arithmetic number, because the mean of its divisors is an integer number (6105285468).

Almost surely, 2^61451761534 is an apocalyptic number.

61451761534 is a deficient number, since it is larger than the sum of its proper divisors (36232805954).

61451761534 is a wasteful number, since it uses less digits than its factorization.

61451761534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1568739.

The product of its digits is 302400, while the sum is 43.

The spelling of 61451761534 in words is "sixty-one billion, four hundred fifty-one million, seven hundred sixty-one thousand, five hundred thirty-four".