61731477646 has 8 divisors (see below), whose sum is σ = 93979264680. Its totient is φ = 30405056088.

The previous prime is 61731477617. The next prime is 61731477653. The reversal of 61731477646 is 64677413716.

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

It is a junction number, because it is equal to n+sod(n) for n = 61731477593 and 61731477602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230341201 + ... + 230341468.

It is an arithmetic number, because the mean of its divisors is an integer number (11747408085).

Almost surely, 2^61731477646 is an apocalyptic number.

61731477646 is a deficient number, since it is larger than the sum of its proper divisors (32247787034).

61731477646 is a wasteful number, since it uses less digits than its factorization.

61731477646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460682738.

The product of its digits is 3556224, while the sum is 52.

The spelling of 61731477646 in words is "sixty-one billion, seven hundred thirty-one million, four hundred seventy-seven thousand, six hundred forty-six".