61421431355 has 16 divisors (see below), whose sum is σ = 75283236864. Its totient is φ = 48085724640.

The previous prime is 61421431333. The next prime is 61421431361. The reversal of 61421431355 is 55313412416.

It is not a de Polignac number, because 61421431355 - 2²² = 61417237051 is a prime.

It is a Duffinian number.

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, 3776090 + ... + 3792320.

It is an arithmetic number, because the mean of its divisors is an integer number (4705202304).

Almost surely, 2^61421431355 is an apocalyptic number.

61421431355 is a deficient number, since it is larger than the sum of its proper divisors (13861805509).

61421431355 is a wasteful number, since it uses less digits than its factorization.

61421431355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32386.

The product of its digits is 43200, while the sum is 35.

The spelling of 61421431355 in words is "sixty-one billion, four hundred twenty-one million, four hundred thirty-one thousand, three hundred fifty-five".