615101011561 has 8 divisors (see below), whose sum is σ = 636352692480. Its totient is φ = 593852084112.

The previous prime is 615101011523. The next prime is 615101011661. The reversal of 615101011561 is 165110101516.

615101011561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 615101011561 - 2¹³ = 615101003369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (615101011661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228655 + ... + 1132468.

It is an arithmetic number, because the mean of its divisors is an integer number (79544086560).

Almost surely, 2^615101011561 is an apocalyptic number.

It is an amenable number.

615101011561 is a deficient number, since it is larger than the sum of its proper divisors (21251680919).

615101011561 is a wasteful number, since it uses less digits than its factorization.

615101011561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1376735.

The product of its (nonzero) digits is 900, while the sum is 28.

The spelling of 615101011561 in words is "six hundred fifteen billion, one hundred one million, eleven thousand, five hundred sixty-one".