61901836417 has 4 divisors (see below), whose sum is σ = 61902436180. Its totient is φ = 61901236656.

The previous prime is 61901836333. The next prime is 61901836463. The reversal of 61901836417 is 71463810916.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 25710198336 + 36191638081 = 160344^2 + 190241^2 .

It is a cyclic number.

It is not a de Polignac number, because 61901836417 - 2³¹ = 59754352769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61901836817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101178 + ... + 366115.

It is an arithmetic number, because the mean of its divisors is an integer number (15475609045).

Almost surely, 2^61901836417 is an apocalyptic number.

It is an amenable number.

61901836417 is a deficient number, since it is larger than the sum of its proper divisors (599763).

61901836417 is a wasteful number, since it uses less digits than its factorization.

61901836417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599762.

The product of its (nonzero) digits is 217728, while the sum is 46.

The spelling of 61901836417 in words is "sixty-one billion, nine hundred one million, eight hundred thirty-six thousand, four hundred seventeen".