61520061640022 has 4 divisors (see below), whose sum is σ = 92280092460036. Its totient is φ = 30760030820010.

The previous prime is 61520061639977. The next prime is 61520061640057. The reversal of 61520061640022 is 22004616002516.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15380015410004 + ... + 15380015410007.

It is an arithmetic number, because the mean of its divisors is an integer number (23070023115009).

Almost surely, 2^{61520061640022} is an apocalyptic number.

61520061640022 is a deficient number, since it is larger than the sum of its proper divisors (30760030820014).

61520061640022 is a wasteful number, since it uses less digits than its factorization.

61520061640022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30760030820013.

The product of its (nonzero) digits is 34560, while the sum is 35.

Adding to 61520061640022 its reverse (22004616002516), we get a palindrome (83524677642538).

The spelling of 61520061640022 in words is "sixty-one trillion, five hundred twenty billion, sixty-one million, six hundred forty thousand, twenty-two".