142959976381 has 4 divisors (see below), whose sum is σ = 149175627552. Its totient is φ = 136744325212.

The previous prime is 142959976361. The next prime is 142959976447. The reversal of 142959976381 is 183679959241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 183679959241 = 428579².

It is not a de Polignac number, because 142959976381 - 2⁷ = 142959976253 is a prime.

It is a super-2 number, since 2×142959976381² (a number of 23 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 (142959976351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3107825551 + ... + 3107825596.

It is an arithmetic number, because the mean of its divisors is an integer number (37293906888).

Almost surely, 2^142959976381 is an apocalyptic number.

It is an amenable number.

142959976381 is a deficient number, since it is larger than the sum of its proper divisors (6215651171).

142959976381 is an equidigital number, since it uses as much as digits as its factorization.

142959976381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6215651170.

The product of its digits is 29393280, while the sum is 64.

It can be divided in two parts, 1429599 and 76381, that added together give a triangular number (1505980 = T₁₇₃₅).

The spelling of 142959976381 in words is "one hundred forty-two billion, nine hundred fifty-nine million, nine hundred seventy-six thousand, three hundred eighty-one".