51061561423402 has 32 divisors (see below), whose sum is σ = 81843767736192. Its totient is φ = 23838353482944.

The previous prime is 51061561423373. The next prime is 51061561423463. The reversal of 51061561423402 is 20432416516015.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52677168 + ... + 53637739.

It is an arithmetic number, because the mean of its divisors is an integer number (2557617741756).

Almost surely, 2^{51061561423402} is an apocalyptic number.

51061561423402 is a deficient number, since it is larger than the sum of its proper divisors (30782206312790).

51061561423402 is a wasteful number, since it uses less digits than its factorization.

51061561423402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106315182.

The product of its (nonzero) digits is 172800, while the sum is 40.

Adding to 51061561423402 its reverse (20432416516015), we get a palindrome (71493977939417).

The spelling of 51061561423402 in words is "fifty-one trillion, sixty-one billion, five hundred sixty-one million, four hundred twenty-three thousand, four hundred two".