72000010061 has 4 divisors (see below), whose sum is σ = 82285725792. Its totient is φ = 61714294332.

The previous prime is 72000010057. The next prime is 72000010063. The reversal of 72000010061 is 16001000027.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72000010061 - 2² = 72000010057 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72000010063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5142857855 + ... + 5142857868.

It is an arithmetic number, because the mean of its divisors is an integer number (20571431448).

Almost surely, 2^72000010061 is an apocalyptic number.

It is an amenable number.

72000010061 is a deficient number, since it is larger than the sum of its proper divisors (10285715731).

72000010061 is a wasteful number, since it uses less digits than its factorization.

72000010061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10285715730.

The product of its (nonzero) digits is 84, while the sum is 17.

Adding to 72000010061 its reverse (16001000027), we get a palindrome (88001010088).

The spelling of 72000010061 in words is "seventy-two billion, ten thousand, sixty-one".