61838243654 has 8 divisors (see below), whose sum is σ = 101189853288. Its totient is φ = 28108292560.

The previous prime is 61838243653. The next prime is 61838243659. The reversal of 61838243654 is 45634283816.

It is a happy number.

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

It is a super-2 number, since 2×61838243654² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61838243653) 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, 1405414607 + ... + 1405414650.

It is an arithmetic number, because the mean of its divisors is an integer number (12648731661).

Almost surely, 2^61838243654 is an apocalyptic number.

61838243654 is a deficient number, since it is larger than the sum of its proper divisors (39351609634).

61838243654 is a wasteful number, since it uses less digits than its factorization.

61838243654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2810829270.

The product of its digits is 3317760, while the sum is 50.

The spelling of 61838243654 in words is "sixty-one billion, eight hundred thirty-eight million, two hundred forty-three thousand, six hundred fifty-four".