61914154498561 has 4 divisors (see below), whose sum is σ = 64606074259392. Its totient is φ = 59222234737732.

The previous prime is 61914154498549. The next prime is 61914154498613. The reversal of 61914154498561 is 16589445141916.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61914154498561 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61914154498493 and 61914154498502.

It is not an unprimeable number, because it can be changed into a prime (61914154418561) 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, 1345959880381 + ... + 1345959880426.

It is an arithmetic number, because the mean of its divisors is an integer number (16151518564848).

Almost surely, 2^{61914154498561} is an apocalyptic number.

It is an amenable number.

61914154498561 is a deficient number, since it is larger than the sum of its proper divisors (2691919760831).

61914154498561 is a wasteful number, since it uses less digits than its factorization.

61914154498561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2691919760830.

The product of its digits is 37324800, while the sum is 64.

The spelling of 61914154498561 in words is "sixty-one trillion, nine hundred fourteen billion, one hundred fifty-four million, four hundred ninety-eight thousand, five hundred sixty-one".