15021740061 has 40 divisors (see below), whose sum is σ = 22792097240. Its totient is φ = 9858506112.

The previous prime is 15021740047. The next prime is 15021740093. The reversal of 15021740061 is 16004712051.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 811908036 + 14209832025 = 28494^2 + 119205^2 .

It is not a de Polignac number, because 15021740061 - 2⁷ = 15021739933 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15021740011) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1380735 + ... + 1391571.

It is an arithmetic number, because the mean of its divisors is an integer number (569802431).

Almost surely, 2^15021740061 is an apocalyptic number.

It is an amenable number.

15021740061 is a deficient number, since it is larger than the sum of its proper divisors (7770357179).

15021740061 is a wasteful number, since it uses less digits than its factorization.

15021740061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11115 (or 11106 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The spelling of 15021740061 in words is "fifteen billion, twenty-one million, seven hundred forty thousand, sixty-one".