61330779399634 has 4 divisors (see below), whose sum is σ = 91996169099454. Its totient is φ = 30665389699816.

The previous prime is 61330779399629. The next prime is 61330779399647. The reversal of 61330779399634 is 43699397703316.

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., 60610662531225 + 720116868409 = 7785285^2 + 848597^2 .

It is a super-2 number, since 2×61330779399634² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15332694849907 + ... + 15332694849910.

Almost surely, 2^{61330779399634} is an apocalyptic number.

61330779399634 is a deficient number, since it is larger than the sum of its proper divisors (30665389699820).

61330779399634 is a wasteful number, since it uses less digits than its factorization.

61330779399634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30665389699819.

The product of its (nonzero) digits is 416649744, while the sum is 70.

The spelling of 61330779399634 in words is "sixty-one trillion, three hundred thirty billion, seven hundred seventy-nine million, three hundred ninety-nine thousand, six hundred thirty-four".