61915849445 has 8 divisors (see below), whose sum is σ = 74300722200. Its totient is φ = 49531544320.

The previous prime is 61915849403. The next prime is 61915849517. The reversal of 61915849445 is 54494851916.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 36508127041 + 25407722404 = 191071^2 + 159398^2 .

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

It is not a de Polignac number, because 61915849445 - 2¹⁴ = 61915833061 is a prime.

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, 154265 + ... + 384225.

It is an arithmetic number, because the mean of its divisors is an integer number (9287590275).

Almost surely, 2^61915849445 is an apocalyptic number.

It is an amenable number.

61915849445 is a deficient number, since it is larger than the sum of its proper divisors (12384872755).

61915849445 is a wasteful number, since it uses less digits than its factorization.

61915849445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283815.

The product of its digits is 6220800, while the sum is 56.

The spelling of 61915849445 in words is "sixty-one billion, nine hundred fifteen million, eight hundred forty-nine thousand, four hundred forty-five".