309819677542 has 16 divisors (see below), whose sum is σ = 489649224960. Its totient is φ = 146618611272.

The previous prime is 309819677537. The next prime is 309819677543. The reversal of 309819677542 is 245776918903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309819677543) 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, 3794578 + ... + 3875365.

It is an arithmetic number, because the mean of its divisors is an integer number (30603076560).

It is a 1-persistent number, because it is pandigital, but 2⋅309819677542 = 619639355084 is not.

Almost surely, 2^309819677542 is an apocalyptic number.

309819677542 is a deficient number, since it is larger than the sum of its proper divisors (179829547418).

309819677542 is a wasteful number, since it uses less digits than its factorization.

309819677542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7671027.

The product of its (nonzero) digits is 22861440, while the sum is 61.

The spelling of 309819677542 in words is "three hundred nine billion, eight hundred nineteen million, six hundred seventy-seven thousand, five hundred forty-two".