61351645402 has 4 divisors (see below), whose sum is σ = 92027468106. Its totient is φ = 30675822700.

The previous prime is 61351645387. The next prime is 61351645409. The reversal of 61351645402 is 20454615316.

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

It can be written as a sum of positive squares in only one way, i.e., 55653056281 + 5698589121 = 235909^2 + 75489^2 .

It is not an unprimeable number, because it can be changed into a prime (61351645409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15337911349 + ... + 15337911352.

Almost surely, 2^61351645402 is an apocalyptic number.

61351645402 is a deficient number, since it is larger than the sum of its proper divisors (30675822704).

61351645402 is a wasteful number, since it uses less digits than its factorization.

61351645402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30675822703.

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 61351645402 in words is "sixty-one billion, three hundred fifty-one million, six hundred forty-five thousand, four hundred two".