61551771403 has 8 divisors (see below), whose sum is σ = 63546239360. Its totient is φ = 59557861440.

The previous prime is 61551771389. The next prime is 61551771493. The reversal of 61551771403 is 30417715516.

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

It is a cyclic number.

It is not a de Polignac number, because 61551771403 - 2¹⁷ = 61551640331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61551771493) 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, 90751 + ... + 362407.

It is an arithmetic number, because the mean of its divisors is an integer number (7943279920).

Almost surely, 2^61551771403 is an apocalyptic number.

61551771403 is a deficient number, since it is larger than the sum of its proper divisors (1994467957).

61551771403 is a wasteful number, since it uses less digits than its factorization.

61551771403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278997.

The product of its (nonzero) digits is 88200, while the sum is 40.

The spelling of 61551771403 in words is "sixty-one billion, five hundred fifty-one million, seven hundred seventy-one thousand, four hundred three".