61663265510 has 96 divisors (see below), whose sum is σ = 140937926400. Its totient is φ = 19208145600.

The previous prime is 61663265509. The next prime is 61663265519. The reversal of 61663265510 is 1556236616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61663265519) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15041441 + ... + 15045539.

It is an arithmetic number, because the mean of its divisors is an integer number (1468103400).

Almost surely, 2^61663265510 is an apocalyptic number.

61663265510 is an abundant number, since it is smaller than the sum of its proper divisors (79274660890).

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

61663265510 is a wasteful number, since it uses less digits than its factorization.

61663265510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6922 (or 6915 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 41.

The spelling of 61663265510 in words is "sixty-one billion, six hundred sixty-three million, two hundred sixty-five thousand, five hundred ten".