61207840919 has 16 divisors (see below), whose sum is σ = 62647477920. Its totient is φ = 59779399680.

The previous prime is 61207840913. The next prime is 61207840943. The reversal of 61207840919 is 91904870216.

It is a cyclic number.

It is not a de Polignac number, because 61207840919 - 2¹⁶ = 61207775383 is a prime.

It is a super-2 number, since 2×61207840919² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61207840913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11587559 + ... + 11592839.

It is an arithmetic number, because the mean of its divisors is an integer number (3915467370).

Almost surely, 2^61207840919 is an apocalyptic number.

61207840919 is a deficient number, since it is larger than the sum of its proper divisors (1439637001).

61207840919 is a wasteful number, since it uses less digits than its factorization.

61207840919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6290.

The product of its (nonzero) digits is 217728, while the sum is 47.

The spelling of 61207840919 in words is "sixty-one billion, two hundred seven million, eight hundred forty thousand, nine hundred nineteen".