61251402165403 has 8 divisors (see below), whose sum is σ = 61351175571840. Its totient is φ = 61151630379840.

The previous prime is 61251402165389. The next prime is 61251402165461. The reversal of 61251402165403 is 30456120415216.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61251402165403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61251402165203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92583798 + ... + 93243028.

It is an arithmetic number, because the mean of its divisors is an integer number (7668896946480).

Almost surely, 2^{61251402165403} is an apocalyptic number.

61251402165403 is a deficient number, since it is larger than the sum of its proper divisors (99773406437).

61251402165403 is a wasteful number, since it uses less digits than its factorization.

61251402165403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810437.

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

The spelling of 61251402165403 in words is "sixty-one trillion, two hundred fifty-one billion, four hundred two million, one hundred sixty-five thousand, four hundred three".