61015155105 has 16 divisors (see below), whose sum is σ = 97689672000. Its totient is φ = 32519608128.

The previous prime is 61015155059. The next prime is 61015155127. The reversal of 61015155105 is 50155151016.

It is not a de Polignac number, because 61015155105 - 2⁹ = 61015154593 is a prime.

It is a super-2 number, since 2×61015155105² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

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, 1339855 + ... + 1384644.

It is an arithmetic number, because the mean of its divisors is an integer number (6105604500).

Almost surely, 2^61015155105 is an apocalyptic number.

It is an amenable number.

61015155105 is a deficient number, since it is larger than the sum of its proper divisors (36674516895).

61015155105 is a wasteful number, since it uses less digits than its factorization.

61015155105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2726000.

The product of its (nonzero) digits is 3750, while the sum is 30.

The spelling of 61015155105 in words is "sixty-one billion, fifteen million, one hundred fifty-five thousand, one hundred five".