61498418661 has 24 divisors (see below), whose sum is σ = 90912176160. Its totient is φ = 40047280416.

The previous prime is 61498418627. The next prime is 61498418677. The reversal of 61498418661 is 16681489416.

61498418661 is a `hidden beast` number, since 614 + 9 + 8 + 4 + 18 + 6 + 6 + 1 = 666.

It is not a de Polignac number, because 61498418661 - 2³⁵ = 27138680293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61498418598 and 61498418607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61498417661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 285475 + ... + 452208.

It is an arithmetic number, because the mean of its divisors is an integer number (3788007340).

Almost surely, 2^61498418661 is an apocalyptic number.

It is an amenable number.

61498418661 is a deficient number, since it is larger than the sum of its proper divisors (29413757499).

61498418661 is a wasteful number, since it uses less digits than its factorization.

61498418661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737905 (or 737902 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 54.

The spelling of 61498418661 in words is "sixty-one billion, four hundred ninety-eight million, four hundred eighteen thousand, six hundred sixty-one".