61529478494 has 32 divisors (see below), whose sum is σ = 102033872640. Its totient is φ = 27594049600.

The previous prime is 61529478481. The next prime is 61529478499. The reversal of 61529478494 is 49487492516.

It is a super-3 number, since 3×61529478494³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61529478499) 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, 1367447 + ... + 1411725.

It is an arithmetic number, because the mean of its divisors is an integer number (3188558520).

Almost surely, 2^61529478494 is an apocalyptic number.

61529478494 is a deficient number, since it is larger than the sum of its proper divisors (40504394146).

61529478494 is a wasteful number, since it uses less digits than its factorization.

61529478494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45136.

The product of its digits is 17418240, while the sum is 59.

The spelling of 61529478494 in words is "sixty-one billion, five hundred twenty-nine million, four hundred seventy-eight thousand, four hundred ninety-four".