61687670845400 has 24 divisors (see below), whose sum is σ = 143423834716020. Its totient is φ = 24675068338080.

The previous prime is 61687670845391. The next prime is 61687670845421. The reversal of 61687670845400 is 454807678616.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 154219176914 + ... + 154219177313.

Almost surely, 2^{61687670845400} is an apocalyptic number.

It is an amenable number.

61687670845400 is an abundant number, since it is smaller than the sum of its proper divisors (81736163870620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61687670845400 is a wasteful number, since it uses less digits than its factorization.

61687670845400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308438354243 (or 308438354234 counting only the distinct ones).

The product of its (nonzero) digits is 54190080, while the sum is 62.

The spelling of 61687670845400 in words is "sixty-one trillion, six hundred eighty-seven billion, six hundred seventy million, eight hundred forty-five thousand, four hundred".