61661600156010 has 32 divisors (see below), whose sum is σ = 147989930437440. Its totient is φ = 16442861145728.

The previous prime is 61661600155963. The next prime is 61661600156021. The reversal of 61661600156010 is 1065100616616.

It is a self number, because there is not a number n which added to its sum of digits gives 61661600156010.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12349467 + ... + 16608206.

It is an arithmetic number, because the mean of its divisors is an integer number (4624685326170).

Almost surely, 2^{61661600156010} is an apocalyptic number.

61661600156010 is an abundant number, since it is smaller than the sum of its proper divisors (86328330281430).

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

61661600156010 is a wasteful number, since it uses less digits than its factorization.

61661600156010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29028662.

The product of its (nonzero) digits is 38880, while the sum is 39.

The spelling of 61661600156010 in words is "sixty-one trillion, six hundred sixty-one billion, six hundred million, one hundred fifty-six thousand, ten".