61601436493 has 12 divisors (see below), whose sum is σ = 63343922292. Its totient is φ = 59905687680.

The previous prime is 61601436439. The next prime is 61601436539. The reversal of 61601436493 is 39463410616.

It can be written as a sum of positive squares in 6 ways, for example, as 7704099529 + 53897336964 = 87773^2 + 232158^2 .

It is not a de Polignac number, because 61601436493 - 2²⁹ = 61064565581 is a prime.

It is a super-2 number, since 2×61601436493² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61601436893) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2920521 + ... + 2941537.

It is an arithmetic number, because the mean of its divisors is an integer number (5278660191).

Almost surely, 2^61601436493 is an apocalyptic number.

It is an amenable number.

61601436493 is a deficient number, since it is larger than the sum of its proper divisors (1742485799).

61601436493 is a wasteful number, since it uses less digits than its factorization.

61601436493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23232 (or 23195 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 43.

The spelling of 61601436493 in words is "sixty-one billion, six hundred one million, four hundred thirty-six thousand, four hundred ninety-three".