61151004643 has 4 divisors (see below), whose sum is σ = 63123617728. Its totient is φ = 59178391560.

The previous prime is 61151004631. The next prime is 61151004647. The reversal of 61151004643 is 34640015116.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61151004643 is a prime.

It is a super-3 number, since 3×61151004643³ (a number of 33 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 1972613053 = 61151004643 / (6 + 1 + 1 + 5 + 1 + 0 + 0 + 4 + 6 + 4 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61151004647) 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, 986306496 + ... + 986306557.

It is an arithmetic number, because the mean of its divisors is an integer number (15780904432).

Almost surely, 2^61151004643 is an apocalyptic number.

61151004643 is a deficient number, since it is larger than the sum of its proper divisors (1972613085).

61151004643 is a wasteful number, since it uses less digits than its factorization.

61151004643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1972613084.

The product of its (nonzero) digits is 8640, while the sum is 31.

Adding to 61151004643 its reverse (34640015116), we get a palindrome (95791019759).

The spelling of 61151004643 in words is "sixty-one billion, one hundred fifty-one million, four thousand, six hundred forty-three".