61216159501 has 16 divisors (see below), whose sum is σ = 71683089408. Its totient is φ = 51180220800.

The previous prime is 61216159493. The next prime is 61216159517. The reversal of 61216159501 is 10595161216.

It is a cyclic number.

It is not a de Polignac number, because 61216159501 - 2³ = 61216159493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61216159001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1489636 + ... + 1530178.

It is an arithmetic number, because the mean of its divisors is an integer number (4480193088).

Almost surely, 2^61216159501 is an apocalyptic number.

It is an amenable number.

61216159501 is a deficient number, since it is larger than the sum of its proper divisors (10466929907).

61216159501 is a wasteful number, since it uses less digits than its factorization.

61216159501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45852.

The product of its (nonzero) digits is 16200, while the sum is 37.

The spelling of 61216159501 in words is "sixty-one billion, two hundred sixteen million, one hundred fifty-nine thousand, five hundred one".