61405601603546 has 4 divisors (see below), whose sum is σ = 92108402405322. Its totient is φ = 30702800801772.

The previous prime is 61405601603527. The next prime is 61405601603551. The reversal of 61405601603546 is 64530610650416.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 57647195130625 + 3758406472921 = 7592575^2 + 1938661^2 .

It is a super-2 number, since 2×61405601603546² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61405601603546.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15351400400885 + ... + 15351400400888.

Almost surely, 2^{61405601603546} is an apocalyptic number.

61405601603546 is a deficient number, since it is larger than the sum of its proper divisors (30702800801776).

61405601603546 is a wasteful number, since it uses less digits than its factorization.

61405601603546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30702800801775.

The product of its (nonzero) digits is 1555200, while the sum is 47.

The spelling of 61405601603546 in words is "sixty-one trillion, four hundred five billion, six hundred one million, six hundred three thousand, five hundred forty-six".